Gear 4 Known as one of Luffy’s most powerful forms, Gear Four is a beast to handle. After being taught the ways of Haki, this Gear combines Luffy’s inflation ability with Busoshoku Haki.

Fans have recently been curious whether he can use Conqueror’s Haki. If he can, this ability will rank him amongst the most formidable and resilient in the One Piece universe.