For about 10 minutes, Luffy could not use Haki at all, and that is precisely why he needed to run circles around his enemies or someone else to defend him. Gear 4 had a massive drawback.

The biggest fight in One Piece ‘s Whole Cake Island arc focused on how Luffy needed to master the Observation Haki in order to match up to Katakuri’s ability to see into the future.

Just as Rayleigh trained Luffy in Haki during the two year time skip, Gaban has been absent from the story — unseen since the flashback arc of Oden’s travelling with the Roger Pirates.

A Difficult Fight For Luffy! The Snake Sisters' Haki Power!! One Piece Summit War (385-516) Episode 413 of 23 ...