The Gaoler (also known as Omnicrone in the SNES/PS version) is an enemy in Chrono Trigger that first appears in the Prison Towers in the Present. Entirely invulnerable to Magic, the Gaoler are only damaged by Physical blows. Physical Techs delivering Magical damage, such as Wind Slash deal zero damage to them. Focus on attacking physically, and it should be easily defeated. Only four Gaolers exist in the game. One is fought in the Prison Towers, near the room with four treasure chests, another is the owner of Medina's Market and can be fought to force the clerk to do business with you, and the remaining two are in Slash's wing of the Fiendlord's Keep. It wears heavy purple armor, sports greenish skin, and wields a massive morning star. Spekkio, after the party reaches a certain level, resembles a Gaoler, but wears reddish armor.