Monkey D. Luffy - 'One Piece' Photo: Toei Animation During his showdown with Donquixote Doflamingo, Monkey D. Luffy activates Gear Fourth. This technique allows him to coat his arm with Busoshoku Haki. Once that condition is met, he bites his forearm and blows air into his body....
Monkey D. Luffy - 'One Piece' Photo: Toei Animation During his showdown with Donquixote Doflamingo, Monkey D. Luffy activates Gear Fourth. This technique allows him to coat his arm with Busoshoku Haki. Once that condition is met, he bites his forearm and blows air into his body....