Rokuougan, also called the Six King Gun, is the strongest technique of the Rokushiki martial arts style used by Rob Lucci, a member of CP9 in One Piece. Lucci unleashes it as a concentrated shockwave from both fists, and it became iconic during his brutal fight with Monkey D. Luffy at Enies Lobby. Fans later clipped the attack sound for soundboards and anime edits, where it still works as shorthand for an overwhelming, almost unfair level of power.