The Ghast, also known as the Geist, is one of the many undead enemies of Final Fantasy II. Ghast has a physical attack that may inflict Paralysis on a party member and may occasionally attempt to blind the party with Blind 4. In order to defeat them, exploit their weakness to the Fire element.
Geist is a German word. Depending on context it can be translated as the English words mind, spirit, or ghost, covering the semantic field of these three English nouns.