Arid Heat Psynergy series
Arid Heat (ヒートドライ, Heat Dry), Arid Blast (パイロドライ, Pyro Dry), and Arid Scorch (アルダードライ, Arider Dry) are a series of Mars attack Psynergy featured in Golden Sun: Dark Dawn. Arid Heat, the first stage of the series, is also a necessary Utility Psynergy. The Sand Prince, found in Ayuthay, is the source of the Psynergy, via the Sand Prince Stone, the Sand Prince can become. Its encyclopedia entry reads as follows:
- "This fire-based Psynergy can evaporate a water source in the blink of an eye."
 Basic Description
Arid Heat, Arid Blast, and Arid Scorch are ranged Psynergies. The damage done by each stage is determined by comparing the user's Mars Power to the target's Mars Resistance, then multiplying this factor by the base power of the particular Psynergy in use.
| Arid Heat
||“Evaporate a water source with great heat.” (DD-present)||Attack up to three targets with a base power of 40.|
| Arid Blast
||“Strike with a parching heat blast.” (DD-present)||Attack up to three targets with a base power of 80.|
| Arid Scorch
||“Strike with a desiccating heat scourge.” (DD-present)||Attack up to three targets with a base power of 120.|
Visually, each stage of the series resembles a column of orange-colored hot air rising from an circular orange energy field. The size of both the hot air column and the energy field increases for each stage of the series.
 Damage Calculations
Elemental Power attacks such as the Arid Heat series use a set base power as the base damage to be modified. For example, the base power of Arid Scorch is 120. Thus an unmodified Arid Scorch would do around 120 points of damage.
The Arid Heat series's attack takes this base damage value and uses it in the following equation:
To word this in prose, The Arid Heat series takes the base damage of the particular attack, and then modifies this by how much higher or lower the user's Mars Power is than the target's Mars Resistance. The difference between the user's Mars Power and the user's Mars Resistance is then divided by 200, then 1 is added to this, resulting in what can be called the "elemental damage multiplier". This number is what the Psynergies' damage is multiplied by.
For example, if an Adept with a Mars Power of 150 casts Arid Scorch on a monster with a Mars Resistance of 50:
- damage = (base damage) * (1 + (Power - Resistance) / 200)
- damage = (120) * (1 + (150 - 50) / 200)
- damage = (120) * (1 + 100 / 200)
- damage = (120) * (1 + 0.5)
- damage = 120 * 1.50
- damage = 180
Therefore, an Arid Scorch cast under these circumstances would deal approximately 180 points of damage to the targeted enemy. Since Arid Scorch is a ranged Psynergy, adjacent targets take a percentage of the total damage, with the percentage decreasing as distance from the main target increases.
 As a Utility Psynergy
Arid Heat, the first Psynergy in the series, in an important Utility Psynergy in Golden Sun: Dark Dawn. It allows the player to evaporate water out of small bowls; in most cases, this helps to manipulate the water levels in the surrounding area. Because of this, it draws comparisons with the Parch Psynergy of The Lost Age, the main difference being elemental alignment. Its range is fairly limited; the player must be within a short radius of the target to use Arid Heat. The effects of Arid Heat can be easily reversed using the Douse Psynergy. Like many Utility Psynergies in the game, the use of Arid Heat is limited to Mars Adepts, the only Adepts that can equip the Sand Prince Stone that bestows the Psynergy. In-game, it is described as utilizing the power of the Sand Prince, a being which resided behind the Alchemy Well in Ayuthay. Arid Heat is specifically required to reverse the flow of the Alchemy Well, which grants access to Barai Temple.
Like many Utility Psynergy, the Arid Heat series is only accessible when an item imbued with the Psynergy, i.e the Sand Prince Stone, has been equipped on a compatible Adept. In this case, the Sand Prince Stone is limited to Mars Adepts. Thus, the series is only available to Tyrell and Eoleo, who will retain it regardless of class, so long as the Sand Prince Stone is equipped. Unlike many series of Psynergy, which are learned in succession, the entire Arid Heat series is learned at once.
General: The main advantage of the Arid Heat series is its ability to remain accessible across many classes. The series has fairly strong power, making it excellent for Mars Adepts that are in a class that has few or weaker Mars Psynergies. In comparison to other Psynergies of similar power, the Arid Heat series is fairly cheap, making it an efficient source of damage.
 By Game
Golden Sun: Dark Dawn: As the only Mars Adept in the party when Arid Heat is gained is Tyrell, he will be the most common source of the Arid Heat series. Since he can learn the entire series at once, he will have access to Arid Scorch around level 12-15. In comparison, he will not learn a stronger multitarget Psynergy in his base class until level 40, when he learns Supernova. Early on, however, his use of the stronger stages is limited by his poor PP pool. During the later portions of the game however, Arid Scorch becomes an efficient source of damage, being nearly half as costly as Supernova and Eruption for an only slightly lower base power; thus Arid Scorch is extremely useful when the player is in situations where Tyrell would need to use an multi-target Psynergy but still conserve PP.
 Usage by enemies
As the source of the Arid Heat series, the Sand Prince has access to the Arid Blast Psynergy when he is battled.
|Utility Psynergy in Golden Sun: Dark Dawn|
|Field effect||Arid Heat • Avoid • Cold Snap • Crush • Douse • Fireball • Gale/Whirlwind • Grip • Growth • Insight • Move • Retreat • Search • Slap • Spirit Sense • Thermal • Track|
|Restorative||Boon series • Cure Poison • Cure series • Fresh Breeze series • Ply series • Revive • Wish series|
|Mars Psynergy in Dark Dawn|
|Elemental Base Damage||Arid Heat series • Beam series • Blast series • Crush • Dragon Cloud / Epicenter • Fireball series • Fire Bomb series • Flare series • Fume series • Lava Shower series • Raging Heat series • Starburst series • Volcano series|
|Elemental Phys. Attack||Heat Wave / Liquefier • Keelhaul / Vicious Chop • Planet Diver / Planetary|
|Support||Guard series • Guardian series • Impair series|
|Utility||Arid Heat • Crush • Fireball • Thermal|