Ayuthay

Ayuthay is an ancient city that has only become a thriving oasis in Angara's southern desert-like coast in recent decades.

Ayuthay (アヤタユ Ayathay) is a prominent city featured in Golden Sun: Dark Dawn, situated in the southern Ei-Jei region of Angara. It is an ancient city of carved stone that contains the Alchemy Well, an Alchemy Machine that has been synthesizing massive quantities of water for Ayuthay's personal use since 20 years prior to the events of Dark Dawn. Both Ayuthay and its ally, the smithing village of Passaj built into the Khiren Mountains north of it, were built in the ancient past by the long-absent Exathi culture of craftsmen. The two kingdoms' respective Alchemy Machines make them both military targets of King Wo of Kaocho, a country located to Ayuthay's northeast.

When Matthew's traveling party of Adepts find that their only route into the Morgal region north of Ei-Jei requires them to activate Passaj's long-dormant Alchemy Forge, they are instructed to seek the help of Ayuthay's prince, the Mercury Adept Amiti. After sneaking into the underground shelter used by Ayuthay's citizens to evade the occupying Kaocho forces, the party, with the blessing of Ayuthay's King Paithos, helps Amiti realize his destiny as the wielder of the Insight Glass hidden deep in Barai Temple, a dungeon submerged in Ayuthay's personal pond, Barai Pond. Amiti then joins Matthew's party to help them retrieve the Sol Mask from the Ouroboros dungeon underneath Kaocho, which is the implement needed to bring the Alchemy Forge to full functionality.

In Golden Sun: Dark Dawn

For all NPC gossip, see Side Scripts.

When the player's party takes the southeast exit from Harapa and begins exploring Angara's southern Ei-Jei regions, all three of the other primary settlements in the region can technically be entered right away. However, Ayuthay – located at where southern Ei-Jei begins jutting out into the Eastern Sea as a peninsula – is the only one of the three that cannot be meaningfully explored at first, owing to an occupation of its surface level by soldiers sent from Kaocho to the northeast.

The military occupation of Ayuthay's surface level prevents the party from using the raft to cross Barai Pond until they present Wo's Letter to the soldiers.

The player requires Wo's Letter to explore the rest of the surface level of Ayuthay, but the Tree Flute will then be required to enter the underground shelter built underneath the palace, where all the citizens have moved to hide from the soldiers. Therefore, the player must head to Passaj Mountain Climb north-by-northwest from Ayuthay and reach the mountain city of Passaj at its peak, then engage in several cutscenes that will eventually task the party with entering Ayuthay's shelter. The Tree Flute will be given to the party before they leave. The player must also enter Kaocho and trigger a cutscene in its palace to be given Wo's Letter by King Wo.

The narrative presumes the player will visit Passaj before Kaocho, and it will define the player's overarching objective in Ei-Jei as retrieving the Sol Mask from the Ouroboros dungeon underneath Kaocho and inserting it into Passaj's Alchemy Forge. The party will be tasked with using the Tree Flute to meet Ayuthay's prince Amiti in the underground shelter so that he can help the party infiltrate the Ouroboros. Once the player sees firsthand that they cannot navigate Ayuthay's occupied surface level without written permission from King Wo, they would then head to Kaocho with the idea to go to the king for it. Technically, nothing of mechanical relevance will be affected if Kaocho is visited before Passaj, and Wo's Letter can be gotten before the Tree Flute.

Surface-level exploration

With both the Tree Flute and Wo's Letter in your party's inventory, you can enter the first exterior screen of Ayuthay, which mostly consists of a pond called Barai Pond in-universe. Talking to any of the soldiers automatically brings up your menu, and each one will have a different response if you use Wo's Letter in front of them; doing this with either of the two soldiers at the bottom and center of the pond compels them to step aside regardless of whether you say "yes" or "no" to their question.

The surface-level courtyard conceals an entrance underground behind an unassuming tree, which opens in response to the Tree Flute.

Because there is no raftsman currently available, you will have to propel the first raft yourself using the Whirlwind Psynergy to navigate the lilypad-filled pond. The lilypads can be walked and jumped across and will stop the raft as though they were solid objects, so cast Whirlwind south and then east to propel the first raft north and then west. Hop west across four lilypads to an island with another raft; climbing to the top of the palm tree on this island will automatically add one of the game's Apples to the party's inventory. Propel the second raft north and then west to reach the chest at the center of the west end of the screen, which contains one of the game's Cookies, then propel it back east and then south. Propelling the raft east against the temple-like structure in the center of the pond, then north, lets you enter the next exterior screen up north through the center exit with the paved path.

Atop the front steps of the surface-level palace at Ayuthay, show another pair of standing guards Wo's Letter to get one of them to enter the front doorway. Follow him inside to see a cutscene with the generals Ku-Tsung and Ku-Embra, and show Wo's Letter to Ku-Tsung on the left to continue the cutscene. The duo will eventually leave you with orders to "exorcise the spirits" whose voices were heard laughing at them. You cannot enter the stone gate, and the exit to the left leads to a dead-end, so take the right exit out onto a balcony. Cast Growth on the sapling visible to your left to turn it into a ladder; at its top, going anywhere right is also a dead-end, so head west from the vine ladder, head back inside, head north through the door all the way at the east end of the watery hall you enter, and follow along to the tree in the courtyard.

The moment you use the Tree Flute to make the stone face on the tree rise, you will be automatically shuttled through the briefly exposed hole into the underground shelter. This prevents the party from exiting Ayuthay for a good while, and it will take one complete playthrough of a dungeon and two separate boss encounters to eventually become capable of returning to the overworld.

At the end of a fairly long cutscene with Amiti in the "landing room" in Floor 2F of the underground shelter, following him north out the door will cause him to open a sealed doorway using his own flute, and you will automatically follow him through. You will be prevented from horizontally deviating from the course Amiti leads you straight north through. Once you step into the throne room at the north end of Ayuthay, a very long cutscene takes place with Ayuthay's king, Paithos. When the cutscene ends, Amiti will be depicted as accompanying your party, and you will become capable of exploring the interior levels of Ayuthay freely.

Exploring the underground shelter

The party is free to explore every room inside Ayuthay's shelter, though the official exit – which is through the stone gate mentioned earlier – cannot currently be used because two guards block the way at the top of the ladder accessible from the south-center of Floor 2F. Paithos will not give the party permission to leave because the party will have agreed to find a way to drain Barai Pond of its water, then infiltrate Barai Temple in the center of the pond and retrieve the Insight Glass utility Psynergy item. Both of the exits back outside near the base of the exit ladder at the south end of Floor 2F lead to dead-ends, so you can only take any of three stairwells downstairs to the plaza constituting Floor 1F.

Ayuthay's underground portion is a thriving community that keeps out Kaocho's occupying force of soldiers on the surface level.

The gray drawers in the room at the northeast corner of Floor 2F contains a freely collectable Open Helm; on the other hand, the armor vendor in Ayuthay's 1F plaza introduces the Bronze Helm as a generic helm to purchase for Matthew and Tyrell. Other newly introduced pieces of gear at the armor vendor include Adept's Clothes, Leda's Bracelet (which is simply the Armlet from the GBA duology and has no relation to the Leda's Bracelet from The Lost Age), and Silver Circlet, and one of only two Safety Boots available in Dark Dawn appears in the Artifacts menu.

The weapon vendor, meanwhile, introduces the similarly expensive Battle Rapier and Battle Mace, as well as the much cheaper Broad Axe. Checking the inventory of the item shopkeeper adds a Potion and Water of Life to the Artifacts menu shared between item vendors.

When you enter the watery structure at the north end of the 1F plaza, you will be introduced to the Alchemy Well, which – unlike the Alchemy Forge in Passaj – is already in full operation thanks to the Luna Mask installed into it. Head through the northeast door as directed to find the tomb of the "Sand Prince", whom you will fight in a boss battle when you play the Tree Flute in front of the black tablet north of the large rock. After defeating the Sand Prince, you will receive the Sand Prince Stone (formatted as "Sand Prince" in most contexts), which provides the complete Arid Heat Psynergy series when equipped – but can only be equipped by your sole Mars Adept, Tyrell.

The Alchemy Well in Ayuthay produces massive amounts of water, but this can be toggled off by casting Arid Heat on the watery bowl in front of the Luna Mask.

Back in the main chamber of the Alchemy Well, follow the hint of the other black tablet embedded northwest of the Luna Mask and turn the bowl of water empty by casting the Arid Heat utility Psynergy on it, evaporating it and putting the Alchemy Well into reverse. This will cause all of the water throughout inner Ayuthay to dry up, turning the interior rooms of Ayuthay yellow and lowering the water level of Barai Pond outside. All the NPCs in Ayuthay will have newly updated gossip, and some of them will have yet another layer of gossip available if you then refill the water bowl in the Alchemy Well with the Douse Psynergy and make the water flow through Ayuthay again. The Alchemy Well can be freely toggled via the bowl at any time.

The chest in the refrigeration room at the northwest area of Floor 2F is no longer submerged, letting you grab a Vial from it. With the water surrounding the drier parts of the 1F plaza now gone, you can now walk down to and through the previously submerged door just left of the doorway marked with the inn sign, letting you find one of the game's Power Breads in a chest behind the innkeeper's counter. Heading down the right stairwell just south of the Great Healer's Sanctum service brings you to a dead-end in the newly opened-up Floor B1 where you can find a Crystal Powder in a chest. The chest in the corresponding room west of this, reached by taking either of the other now-open stairs along the south end of the 1F plaza, contains 299 coins.

A much more valuable collectible opened up via Floor B1 can be set up for collection past the doorway at the far west end of Floor B1's hallway. Now in the formerly flooded, lower-level portion of the room where stonecutters work, push the standalone gray pillar two spots left and up into the dark square indentation to lock it in place. Head back to the Alchemy Well's chamber and fill up the bowl with Douse to return the flowing water to Ayuthay, then reenter the stonecutters' room through the doorway at the far west end of the 1F plaza. You can now use Whirlwind to propel the raft in this room toward the chest at the west end and claim its Dragon Shield. You can return east either by propelling yourself back east or by pushing the gray pillar just above the chest two spaces to the right so that it falls into the water and allows you to hop east from it. Remove Ayuthay's water again using Arid Heat on the Alchemy Well's water bowl.

Barai Pond and Temple

When you step south through the center exit of the Floor B1 hallway, you will emerge at the north end of the newly submerged Barai Pond, with the raft you took earlier in the same position but now lowered to your new level. You can immediately propel the raft west to get to the chest containing one pair of Leather Boots, then propel it back east.

The party must use Whirlwind to propel the raft to the entrance to Barai Temple while the water level is lowered.

Propel the raft south and then east into a cluster of differently sized lilypads. Hop southeast to the beige island with the stone pillar on it and push it two tiles south so that it falls into the water. That way, when you then hop east from the lilypad cluster to another raft at the northeast corner of the pond, you can propel that south, then west against the pillar, then south to an island containing the Glittering Tiara. From there, you can propel the raft west, then north, and then west to land against Barai Temple. (If you did not push the pillar into the water first, bringing the northeast raft to this position against Barai Temple will be more straightforward, but you cannot reach the island with the Glittering Tiara's chest.) Reaching the entrance of Barai Temple is a simple matter of hopping south and west along several more lilypads.

However, before entering Barai Temple, you can propel the raft currently at its east face northward (making this somewhat of a shortcut back to the north-central doorway back into Floor B1 inside), then propel it east. You are presented two separate ladders at the northeast corner of the pond; the left ladder is a dead-end, so climb up the right ladder to reach the southeast corner of the north exterior screen with the palace. Propel the raft north, east, and north to reach an out-of-the-way chest containing a Water of Life, then propel it south, west, south, and west to transport yourself to the Jupiter Djinni Breath, which joins you without putting up a fight. Propel yourself back right and climb back down to the raft in Barai Pond, and propel it west and south to bring yourself back to Barai Temple.

Barai Temple is a dungeon that contains the artifacts Storm Brand and Kimono, the Mercury Djinni Surge, and the aforementioned Insight Glass. When Amiti has gotten the Glass, you can save time returning to the entrance by casting the Retreat Psynergy. Back outside its front entrance, take the raft still pressed against the temple's east face and propel it north once to return to Floor B1 inside the palace. A fairly long cutscene with Paithos will automatically transpire inside, and you will automatically reappear in the main chamber of the Alchemy Well, with Rief filling up the water bowl and returning the Alchemy Well to normal on your behalf.

The party must clear a second boss battle before they can leave Ayuthay.

The gossip of all the NPCs in Ayuthay will have refreshed again, and some of these statements will be very slightly reworded if you reverse the Alchemy Well again. For the record, there is nothing stopping you from lowering the water level, navigating to Barai Temple, and exploring it for any collectibles you may have missed. When you climb up the "exit ladder" at the south-central end of Floor 2F, a cutscene will have Amiti join your party as a permanent party member who can partake in battles, unlocking the function to switch party members between main and reserve parties both in and out of battle. Unlike most sources of utility Psynergy, the Insight Glass is not portrayed as an inventory item that Amiti has to keep equipped; he instead retains innate access to the Insight Psynergy itself.

When you walk out of the stone gate you came across early in your exploration of the surface level of Ayuthay, Amiti demonstrates that the gate can easily open back up for you. However, when you attempt to exit through the door south of the gate, a cutscene triggers where Ku-Tsung and Ku-Embra accost you, and you must defeat them both in a mandatory boss battle that automatically triggers. Afterward, another cutscene with Paithos ensures, and the generals will be locked up within the jail at the east end of Floor 1F of Ayuthay's interior. You can now leave Ayuthay for the overworld, and a soldier on a new raft offers to conveniently ferry you between the south and north ends of Barai Pond whenever you wish to leave or reenter Ayuthay during your remaining time in the Ei-Jei region.

Ayuthay, like the other settlements in the Ei-Jei region, will become unavailable to visit for a large swath of the game once the party uses the Cold Snap Psynergy won in Harapa Ruins to put the Alchemy Forge at Passaj into reverse and rides its cloud platform to the Clouds of Passaj, bringing them into the Morgal region. Unlike some collectibles in the other settlements, nothing at Ayuthay, Barai Pond, or Barai Temple is permanently missable.

Late-game visit

When the party is sailing the Eastern Sea surrounding Angara during the final swath of the game, each of the settlements in the Ei-Jei region can be optionally revisited to see how they are faring while shrouded in the shadows of a certain dark cataclysm spanning the continent. The party can beach their sailing ship right at the peninsula and spend very little time walking to Ayuthay's location in the overworld.

An optional cutscene with King Paithos in the inn, if Ayuthay is revisited during the late-game stretch when the party can explore the Eastern Sea.

The raft service that previously ferried the party between the south and north edges of Barai Pond is no longer present, so you will have to propel the rafts yourself to reach the north exterior screen of the palace. Inside, before opening the stone gate to climb down into the interior, you can head out east and follow the same route you took to get to the courtyard with the winding tree. There, you will find the corpses of Ku-Tsung and Ku-Embra; by casting Sveta's Spirit Sense on either of them, you will be told about a Treasure Note hidden in a cracked tile in the exterior of the palace at Kaocho. This is required if you want to be able to physically examine that tile and retrieve the note, though neither step is ultimately required because the note simply instructs players on how to reach the optional Lost Ship in the northern sea, which can be done at any point regardless.

Either the stone gate or the courtyard tree can be used to reenter the underground shelter, and every possible collectible and service between Ayuthay, Barai Pond, and Barai Temple will remain available even if you skipped over it during your previous visit to Ei-Jei. All the villager gossip will have updated once more, and you can trigger an optional cutscene with Amiti and a bedridden Paithos in the inn. Spirit Sensing Paithos will reveal that there is a treasure room underneath the throne; regardless of whether you learn of this here, the party can push the throne left, then follow downward and cast Arid Heat on a bowl atop a floating platform to lower the water level like an elevator. You will find three treasure chests: the Spirit Gloves, one of the game's Lucky Peppers, and the Heirloom Ring. Any party member can equip this ring for heavy boosts to Mercury Power and Resistance, and it can be repeatedly Used to restore 1,000 HP to a party member.

Vendors

Ayuthay's inn is located in the northwest corner of the underground plaza and costs 8 coins per party member. All of its vendors remain available even when Ayuthay is optionally visited late in the game.

Weapon Shop
Name	Class	Cost	Effect
Broad Sword	Long Sword	1000	Attack +40, Unleashes Critical Strike and Berserk Rush
Broad Axe	Axe	1400	Attack +50, Unleashes Critical Strike and Rolling Attack
Battle Rapier	Light Blade	2900	Attack +58, Unleashes Critical Strike and Berserk Rush
Battle Mace	Mace	2600	Attack +56, Unleashes Power Charge and Critical Strike

Armor Shop
Name	Class	Cost	Effect
Leather Armor	Armor	240	Defense +12
Adept's Clothes	Clothing	850	Defense +18, Max PP +8
Bronze Shield	Shield	500	Defense +14
Leda's Bracelet (Dark Dawn)	Bracelet	900	Defense +17
Bronze Helm	Helm	600	Defense +14
Silver Circlet	Circlet	1300	Defense +16
Artifacts
Safety Boots	Boot	700	Defense +12, Agility *0.7

Item Shop
Name	Class	Cost	Effect
Herb	Consumable Item	10	Restores 50 HP to one Adept
Antidote	Consumable Item	20	Cures Poison and Venom from one Adept
Elixir	Consumable Item	30	Removes Stun, Sleep, and Delusion from one Adept
Sacred Feather	Consumable Item	70	Temporarily lowers monster encounter rate
Artifacts
Potion	Consumable Item	1000	Restores all HP to one Adept
Water of Life	Consumable Item	3000	Revives one downed Adept

Collectibles

The following collectibles can be acquired before using Wo's Letter to gain access to the rest of Barai Pond:

• Antidote: Found inside the lone pot far to the right of the Barai Pond screen.
• Herb: Found inside the barrel far to the left in the Barai Pond screen, south of a chest on the other side of a wall.

The following collectibles can be acquired prior to using the Tree Flute to enter the underground shelter:

• Apple: Automatically acquired as soon as you climb to the top of the palm tree at the west island in Barai Pond.
• Cookie: Found inside the chest at the west end of Barai Pond's screen. After using the raft to get to the island with the Apple, propel the raft north and west to reach the northwest land of the Barai Pond screen and head south to the chest.
• 53 Coins: Found inside the upper of the two jars at the dead-end you come across if you enter the stone entrance just left of the tree with the stone face.

The following collectibles can be acquired throughout Ayuthay's underground shelter:

• Sand Prince: Rewarded by defeating the Sand Prince boss in the back room of the Alchemy Well.
• Open Helm: Found inside the drawers at the far east corner of the northeastern room of Floor 2F.
• 35 Coins: Found inside the left of the two jars in the outside balcony above the east moat, reached by taking the right of the two exits back outside at the south end of Floor 2F.
• Elixir: Found inside the middle of the three barrels arranged vertically against the outside wall of a jail cell in Ayuthay's northeastern jail on Floor 1F.
• Nut: Found inside the crate above the barrel both flush against the west wall in the northwestern refrigeration room of Floor 2F.
• Sleep Bomb: Found inside the center of the three jars in the outside balcony above the west moat, reached by taking the left of the two exits back outside at the south end of Floor 2F.

The following collectibles can be acquired throughout Ayuthay's underground shelter after putting the Alchemy Well in reverse through the Arid Heat Psynergy granted by the Sand Prince utility Psynergy item:

• Dragon Shield: Found inside the chest at the west end of the stonecutting room at the far west end of Floor 1F. While the water level is down, enter the newly open B1 hallway and take its far west exit into the lower level of the stonecutting room, and push a gray pillar into an open indentation on the floor. Toggle the Alchemy Well's water flow back on by casting Douse on its bowl, then return to the stonecutting room and cast Whirlwind to propel the raft west to the ledge where the chest lies.
• Power Bread: Found inside the chest to the left of the innkeeper, reached from behind his counter by walking through the now-open doorway in the plaza between the inn and the far-west stonecutters' room.
• 299 Coins: Found inside the chest in the western of the two rooms connecting to the Floor B1 hallway.
• Crystal Powder: Found inside the chest in the eastern of the two rooms connecting to the Floor B1 hallway.
• Vial: Found inside the formerly submerged chest in the northwest refrigeration room in Floor 2F.

The following collectibles can be acquired when exploring Barai Pond while its water level is lowered because of the Alchemy Well being put into reverse:

• Leather Boots: Found inside the chest at the formerly submerged brown ledge to your left when you enter Barai Pond's lower level from the north, easily reached by propelling the raft west of its starting position.
• Glittering Tiara: Found inside the chest at the southeast island in Barai Pond that was submerged initially. Reaching it with the raft at the upper-right corner of the submerged pond requires you to hop to a brown island east of Barai Temple's structure and push a lone, stone pillar south into the water so that the raft can stop against the pillar and be allowed to be propelled south to the chest.
• Breath: Can be seen idling on a lilypad in the east moat of the main palace screen. Can only be reached while the water level is lowered via the reversal of the Alchemy Well; after moving the northeast raft in the submerged pond against the east surface of the central structure of Barai Temple, propel it north and east to reach the two ladders at the northeast corner of the pond. At the southeast corner of the main palace screen's exterior, propel the raft west along the moat to the Jupiter Djinni, which joins without a fight.
• Water of Life: Found inside the chest at the far northeast corner of the exterior screen of the palace. The same raft that was used to reach the Jupiter Djinni Breath can be propeled northeast along the moat to reach the chest at its northeast end.

Barai Temple itself is a dungeon that allows you to collect the Mercury Djinni Surge, the Storm Brand, and the Kimono, and the Insight Glass is bestowed to Amiti as an unofficial "item" in a cutscene at the end. After completing and leaving the dungeon, a series of events result in the party being joined by Amiti as a new party member, though he knows Insight as an innate Psynergy instead of having the Insight Glass present in his inventory and giving it to him while equipped.

The following collectibles can only be acquired when making a late-game visit to Ayuthay after acquiring the sailing ship to sail the Eastern Sea with, since it requires pushing King Paithos' empty throne left, entering a hidden stairwell underneath, and casting Arid Heat on a water bowl to lower an elevator to a treasure vault:

• Heirloom Ring: Found inside the north chest.
• Spirit Gloves: Found inside the west chest.
• Lucky Pepper: Found inside the east chest.

Meanwhile, casting Spirit Sense on the two corpses in the courtyard with the stone-faced tree will tell you about an optional Treasure Note that was hidden in the cracked stone left of the palace steps in Kaocho. Viewing this spiritual conversation is required to be able to interact with said stone and retrieve the note. Reading the Treasure Note, on the other hand, is not actually a required step to gain access to the optional Lost Ship dungeon in the purple cloud blanketing the north part of the Eastern Sea.

Bestiary

Bestiary of Ayuthay (Surface, Early)
Monster Name	LVL	HP	ATK	DEF	AGI	EXP	Coins	Weakness	Drop	Drop Rate
Harpy	11	113	110	28	52	103	59		Elixir	1/8
Pixie	10	48	74	15	54	79	53		Sleep Bomb	1/16

Bestiary of Ayuthay (Alchemy Well back room)
Monster Name	LVL	HP	ATK	DEF	AGI	EXP	Coins	Weakness	Drop	Drop Rate
Mole	10	89	90	14	30	45	35		Nut	1/8
Sand Prince (boss)	13	1239	162	47	64	1540	825		None	N/A

Bestiary of Ayuthay (after Amiti joins the party)
Monster Name	LVL	HP	ATK	DEF	AGI	EXP	Coins	Weakness	Drop	Drop Rate
Ku-Tsung (boss)	14	831	208	49	76	854	672		Rice Ration	1/1
Ku-Embra (boss)	14	898	207	50	70	793	90		Plump Dumpling	1/1

Bestiary of Ayuthay (Surface, Late-Game)
Monster Name	LVL	HP	ATK	DEF	AGI	EXP	Coins	Weakness	Drop	Drop Rate
Bone Gnawer	35	458	409	138	86	1,985	146		Weasel's Claw	1/16

History

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Ayuthay is a monarchy, currently ruled by King Paithos. The country is known to be closely allied with Passaj, with whom the Ayuthay people have a shared ancestry. While the country was stated to be on good terms with Kaocho in the past, the two countries have been at war for some time. The citizens would hide underground, while Kaocho's army wandered listlessly outside.

Spoiler warning: The following section(s) contain plot details that some people may not wish to learn before reaching this point in the game on their own.

Ayuthay is home to some of the descendants of the Exathi race, a culture of skilled craftsman who allied with the Jenei, ancestors to the Adepts. The Exathi of Ayuthay were noted stonecrafters, not only building Ayuthay itself, but also the Ouroboros labyrinth to the north and nearby Barai Temple. After the sealing of Alchemy, the town's Alchemy Well went inactive, resulting in the area becoming a desert. Ten years after the Golden Sun event, Ayuthay's Alchemy Well was reactivated by a mysterious Mercury Adept. The reactivation resulted in a constant supply of water, allowing the town to experience a time of prosperity.

Ayuthay, at the time the player first visits, is under siege from the army of the neighboring kingdom of Kaocho, ruled by King Wo. The army has already overrun the visible portion of the city, but stalls in their siege when the Ayuthay citizens take refuge in a secret underground portion of the city. Matthew's group, seeking information about entering the Ouroboros, gains permission to explore the ruins from two Kaochan generals. They eventually find the underground city's secret entrance, and gain access to the city via a Tree Flute given by allies in Passaj.

Ayuthay's ancient spires sprinkle water across the surrounding landscape when both Ayuthay's Alchemy Well and Passaj's Alchemy Forge are working in unison.

It is here that they meet Amiti, the prince of Ayuthay, nephew to the city's ruler, Paithos. It is revealed that Amiti had believed himself to be born from his mother's divine powers, and that those same powers were what restarted the Alchemy Well. He soon learns the real story from Paithos: Amiti was actually fathered by a powerful Mercury Adept, and that his mother actually had no Psynergy abilities at all. Paithos also informed the group of the means to enter the Ouroboros: the Insight Glass, an ancient Ayuthayan treasure. Seeking the Insight Glass and to completely restore the Alchemy Well, Amiti travels with Matthew's group, and eventually decides to stay with them on their journey across Angara.

As the group leaves, they are confronted by the Kaochan generals and are forced into battle. With the Adepts proving victorious, Ayuthay imprisons the two generals. The foot soldiers of Kaocho's army have been so poorly led that they do not notice their leaders' disappearances, causing the army to lie around aimlessly. Meanwhile, the Adepts travel to the Ouroboros. Thanks to their efforts, the entire Ei-Jei region is revitalized due to the cooperation of Ayuthay's Alchemy Well, and Passaj's Alchemy Forge.

During the Grave Eclipse, Ayuthay is largely unharmed, thanks to their underground city in the Alchemy Well. However, King Paithos himself falls ill, and is not expected to recover. Meanwhile, the occupying army is decimated, due to their lack of protection. Ayuthay's status following the Eclipse's end is unknown, though Amiti does choose to return to the city.

Trivia

• Ayuthay directly references the real-world kingdom of Ayutthaya, which existed from 1351 to 1767 in Siam (present-day Thailand) in southeast Asia. At its height, Ayutthaya's territorial holdings spanned from the southeastern region of China to the upper segment of the Malay peninsula and encompassed at least parts of modern-day Myanmar, Laos, and Vietnam. As an outcome of the Burmese–Siamese War of 1765–1767, Ayutthaya's capital was razed by Burmese forces dispatched by the recently established Konbaung dynasty in Burma (modern-day Myanmar), and virtually all of Ayutthaya's art and historical records were destroyed. The royal seat of Siam was moved to Thonburi, and what remained of the kingdom rebounded when Burma was forced to divert its occupying forces against China.
• When the party has played the Tree Flute and the cutscene where Amiti is introduced takes place, roughly the first third of the cutscene forgets to initiate idle animations for Tyrell, Karis, and Rief, making them stand as perfectly still models even as Matthew himself looks alive. The three only begin their idle animations once they nod in unison.