Earth Shake (アースシェイク, Āsu Sheiku^?) is a Blue Magic spell exclusive to Final Fantasy IX that can be used by Quina. It is learned by having Quina eat an Adamantoise, Shell Dragon, or Earth Guardian. It inflicts heavy Earth-elemental damage to all enemies, but misses against flying or Floating opponents. The spell is one of the very few Earth-elemental attacks the party has access to. It costs 20 MP to cast. It can't be reflected and works with Return Magic.

Damage formula: