Marineford. Luffy has just watched Ace fall to Admiral Akainu. His body is broken from repeated uses of Gear Second and the strain of Impel Down. He has nothing left—except his will.
In Episode 478 (Chapter 569 of the manga), as Luffy charges toward Ace, he unknowingly unleashes a massive burst of . luffy haki marineford
Commanders such as Marco and allies like Ivankov were stunned, noting that he possessed the same rare power as Whitebeard and Shanks . Marineford