Nappa powers up and opens his mouth to charge a energy sphere. Then, he fires the energy sphere in the form of an energy wave at the opponent, inflicting a huge amount of damage. Nappa notes it as his ultimate technique.
Nappa uses a weaker version of this move on Chiaotzu after his Psychic Spark fails against the ruthless Saiyan. He later uses this attack during his battle against Goku: after exchanging blows with Goku, Nappa fires the Break Cannon at Goku who quickly counters with a Kamehameha, the two energy waves collide in a Beam Struggle that soon ends with a huge explosion. Nappa then attempts to use the Break Cannon against Gohan and Krillin after losing the battle to Goku, however, Goku flies after Nappa and attacks him with the Kaio-ken Finish, breaking Nappa's back and rendering him unable to fight.