Midgardsormr

Terrato is an Esper from the game Final Fantasy VI. It is obtained in the Narshe mines in Umaro's cave. Once finding it, a fight will ensue with Umaro. If Mog is in the party, he will convince Umaro to join the party, after which both Terrato and Umaro are obtained. Terrato's summon, Earth Aura, deals earth-Elemental damage to all opponents. Its Spell Power is 93, and it is unblockable. However, it cannot hit flying targets. It costs 40 MP to summon, and it teaches the following spells:
 * Quake X3
 * Quartr X1
 * WWind X1