Raimei Hakke, translated as Thunder Bagua, is the signature attack of Kaido, the captain of the Beast Pirates and one of the Four Emperors in Eiichiro Oda's One Piece. Kaido swings his spiked kanabo club wreathed in lightning, delivering a single devastating blow that became famous during the Wano Country arc when it knocked Luffy out in one hit. Clips of the attack circulated widely in anime edits and reaction videos, and fans still use the sound to signal overwhelming strength, a boss-level threat or a fight ending before it has really begun.