Earth Shake is a Blue Magic spell in Final Fantasy IX 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 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: