Luffy was able to manifest the advanced versions of Armament Haki and Conqueror's Haki. For the former, Luffy trained in the Prisoner Mine, and learned how to deal internal damage using Ryuo.

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.

It’s Luffy’s toughest fight yet, and it brings out a side to him that has made fans lose their minds. So, what episode does this all happen and how long will fans catching up have to wait to ...