Being an undead, kept in this world by sheer force of will long after its body has surrendered to corruption. While the decay of its eyes has left it blind, it senses the energy of the living and strikes with deadly accuracy. Though it cannot be known when the creature last breathed, from the state of its yellowed bones, one can only imagine that it has walked in unlife for several thousands of years.
This can be a difficult battle because Hydro will constantly inflict Fear, which causes the party to lose massive amounts of MP. Hydro usually picks one character off until they die. He moves slowly. As Hydro is an undead enemy it is weak to healing magick.
Hydro usually picks one character off until they die and as he moves slowly the player can use this for advantage by equipping a bait with a gun and have him become his target, then run around keeping Hydro distracted.
Another strategy is to cast Reflect on the party, then cast the party's strongest healing spells (Curaja is recommended) and reflect them off the characters to hit Hydro.
This battle can be made easier by giving someone the Holy Lance and inflicting Berserk on them.
Hydro is susceptible to Slow and Oil. Exploiting the Nihopalaoa+Remedy will instantaneously inflict them to it. Even if Holy Lance is not present to equip, Firaga will surely deal massive damage onto it, but casting it would take time because Hydro is prone to use Fearga and thus greatly reduce the party's MP.
[view·edit·purge]The Hydra was one of the spawn of Echidna, a many-headed serpentine monstrosity in Ancient Greek mythology. It could breathe poison, and indeed its very blood was deadly. The Hydra was killed as one of Heracles's Twelve Labors.