Kaiousama taught Goku two powerful techniques. The first one is the Kaio-ken, which doubles his speed, strength, and senses. The second is the deadliest attack in the entire series: the Genkidama (or Spirit Bomb). This attack nearly killed the Saiyan Prince Vegeta and the terrible lizard-like Frieza. It also killed the most powerful villain in Dragon Ball Z, Kid Buu. Each figure measures 6" tall and features multiple points of articulation. Imported.