This article contains spoilers from One Piece's Final Saga. Luffy's current peak power is Gear 5, his awakened devil fruit form enhancing his abilities significantly. Gear 6 is unlikely to exist ...

Unlike Gear 5 though, Gear 4 comes with a bunch of different forms tailored to different combat situations (and maybe how Luffy is feeling for that particular fight). Which means that each version ...

He coats the key in Armament Haki as he does so, with black lightning bolts appearing ... destroy a part of Aurust Castle, as Luffy turns into his Gear 5 form and Zoro draws all three swords.