Although not actually a boss (although it was a Challenge Dungeon boss in the original mobile release), Earth Eater is a tough foe. It tends to cast Absorb Magic to nullify the next spell. However, it cannot nullify Meteor. Quake and Sandstorm can damage the whole party. Bite and Suck In deal major damage to a character and either inflict Poison, Confuse or heal the foe. At least a healer with Doublecast is recommended to disable Magic Absorb by using Cure. Others can strike Earth Eater with their best abilities, F-Abilities or spells, probably Meteor.