Hydra enemy line

The Aqua Hydra, Hydra, and Pyrodra are species of monsters found in Golden Sun: The Lost Age. These monsters, resembling three-headed sea serpents, are palette swaps of each other and have differing levels of power and defense. One of these monsters, the Aqua Hydra, serves as a full-fledged boss monster.

Aqua Hydra
A very large member with light blue scales and a light green underbelly. The Aqua Hydra, as the boss monster of the Lemurian Ship, has 2776 HP, 70PP, 173 Attack, 38 Defense, 63 Agility, and a rather alarming 44 Luck. Its resistances are highly lopsided; it is very resistant to Mercury attacks and highly succeptible to Mars attacks. Felling the Aqua Hydra yields 963 EXP, 1612 coins, and a guaranteed Vial.

In regards to the story, while Piers’ ship was beached on the shoreline south of Dekhan Plateau, its interior was swarmed by dozens of Aqua Jellies. When Felix and Piers return to the ship they must battle through all the jellyfish monsters to take it back. In the last room, six Aqua Jellies suddenly group together, merge, and mutate into the powerful Aqua Hydra. The party must defeat this monster before they can be able to pilot the ship.

The Aqua Hydra actually has a better arsenal of commands than its two later counterparts. It can attack with a physical attack, cast the Drench Psynergy, and use any of four Monster skills. With its Triple Chomp, it can do very strong direct damage to a party member. With its Raging Flood (resembling a low-level wave wash through the Adepts), it can do quite heavy Mercury damage to all Adepts. With its Slaver move (resembling the monster loosing a lot of yellow-purple slobber onto the Adepts), it can lower the defenses of all Adepts by somewhat small increments. And with its Rising Venom move (resembling a light green mound of slimy water lobbed onto the target’s feet), it can damage an Adept and may inflict that party member with Poison (this is identical to the Sticky Poison skill of the Slime Beast).

Strategies to battle the Aqua Hydra are as follows: You should have at least four Mars, Mercury, and Jupiter Djinn by now. Have Sheba and Piers swap their Djinn (they'll both gain Wish Well this way). In the battle, Jenna should summon Meteor on the first turn, then continue to unleash her djinn and summon. Felix can help her out with his Venus Djinn, and Piers with his Jupiter Djinn too (though, summon with Sheba, not Piers, as she has higher Jupiter Power). When Sheba isn't summoning, she should be healing with Wish Well or using High Impact, and same with Piers when he isn't unleashing Djinn.

Hydra
A large member with purple scales and an orange underbelly. The Hydra has 276 HP, 288 Attack, 82 Defense, 102 Agility, and 12 Luck. Its resistances are highly lopsided; it is very resistant to Mercury attacks and highly succeptible to Mars attacks.

The Hydra’s inventory of actions consists only of three of the Aqua Hydra’s commands: It can attack with a physical attack, the Triple Chomp for stronger damage, and Slaver to lower the party’s defenses. Since its Attack and Agility are a good deal higher than those of the Aqua Hydra’s, however, these moves by themselves can be damaging enough.

Felling a Hydra yields 408 EXP, 317 coins, and in somewhat uncommon cases, an Antidote. Hydras are fought throughout the expanses of the Great Western Sea on ship and in the Northern Reaches area where the ship sails through the ice floes.

Pyrodra
A large member with pink scales and a blue underbelly. The Hydra has 384 HP, 451 Attack, 125 Defense, 125 Agility, and 14 Luck. Its resistances are highly lopsided; it is very resistant to Mercury attacks and highly succeptible to Mars attacks.

The Pyrodra’s inventory of actions consists of a physical attack, the Triple Chomp for stronger damage, Fire Breath to do Mars damage to multiple Adepts, and Rising Venom to damage a party member and Poison that member. It is statistically much tougher than the Hydra and is one of the tougher foes to face repeatedly in the inner dungeon of Treasure Isle.

Felling a Pyrodra yields 568 EXP, 387 coins, and in rare cases, a Salamander Tail used for forging Mars-based items, making this a highly battled foe – kill it with Mars Djinn to increase the chance it will drop this item by four times. Pyrodras are fought in the deeper reaches of the Treasure Isle dungeon.

Hydra
Origin: Greece

The Hydra (also known as the Lernaean Hydra) in Greek mythology was an ancient serpent-like water beast that had multiple heads and toxic breath. The Hydra of Lerna, which was slain by Hercules for his Twelve Labors, lived in the Spring of Amymone. Its blood was then used by Hercules to make poisoned arrows for future tasks.