Ark (アーク, Āku?) is an airship-like eidolon in Final Fantasy IX. It attacks Zidane and his party in Oeilvert, as they obtain the Gulug Stone for Kuja. Later in the game, the party may locate two Pumice Pieces, which can then be forged into Pumice by Hades at his Synthesis Shop in Memoria. Pumice can also be received by beating Ozma, the most powerful enemy in the game. Ark's spell power is equal to 106 plus the total number of Lapis Lazulis in the party's inventory.
When equipping Garnet with the Pumice, she can learn to summon Ark. Its attack is called Eternal Darkness (暗黒の運命, Ankoku no Unmei), which deals Shadow-elemental damage to all enemies. It costs 80 MP to summon. Ark is notable for its long attack animation - the full length attack is almost two minutes, and the short animation is longer than most summons' long animations.
- Main article: Ark (Boss)
Ark is fought as a boss at Oeilvert.
- The Pumice item used to summon Ark is known as "Fuyuuishi" (ふゆう石, or "floating stone"). In the original NES version of the original Final Fantasy, this item was translated as "FLOATER," and was used to lift the ancient airship from the desert. This bond is strengthened by the fact that Ark takes the form of an airship.