Steam

Steam is a Mercury Djinni found in Golden Sun: The Lost Age, and is numerically the thirteenth Mercury Djinni found overall and the sixth found in The Lost Age.

Location
It is found in the interior of Aqua Rock; to reach it, acquire the dungeon’s Parch Psynergy and use it on the water source of the Moai statue behind the Djinni to remove the flowing water that blocks the way to the Djinni. It must then be battled

Description
When Set, it increases base HP by 10 and base Attack by 5.

When used, Steam raises all battling party member’s Resistances by 40, and it can later be used again to raise resistances further to 80 maximum. This is contrary to the game’s description of the Djinni’s effect as increasing “all allies’ Elemental strength.”

Analysis
This Djinni effect is identical to that of Jupiter Djinni Breeze and twice as strong as the Resist Psynergy.