Kaiōken, lit. "Fist of the King of Worlds" is a technique invented by King Kai. It multiplies the user's ki for a "heartbeat" and turns their aura crimson - amplifying their power and speed to overcome previously stronger foes at the cost of extreme bodily recoil. Strong ki control is required in order to wield the Kaio-ken properly, or the user might become an angry faggot incel fox.