God Breaker (ゴッドブレイカー) is an energy wave attack used by Future Trunks and Present Trunks in their Super Saiyan, or base (Present Trunks only) form. Trunks extends his hand forward and fires a yellow energy wave at his opponent, inflicting a large amount of damage.
Future Trunks uses this attack at Northern Wastelands to kill King Cold. After receiving Future Trunks' sword, believing it to be the young Saiyan's source of power, King Cold tries to slash him with it. However, Future Trunks easily catches the sword with his bare hands and blasts a hole through King Cold with the God Breaker, gravely injuring and blasting the tyrant onto the side of a cliff. Future Trunks then destroys King Cold's body with a second God Breaker; in the anime version, King Cold desperately begs for his life before the second attack. In both versions, Future Trunks uses the God Breaker once again to destroy King Cold's spaceship.
Years later, Present Trunks uses a similar energy wave attack, but in his base form, during his match against Goten in the 25th World Martial Arts Tournament, right before Goten attacks him at high speed. As an adult, in his base form as well, Present Trunks uses an attack very similar to the God Breaker on M-2 to blast the recently released Baby and later on Earth against villains escaped from Hell.