First, the user puts his two arms on his right side and charges a large, powerful ball of ki. Then, he throws the ball at his opponent, causing an explosion which inflicts a large amount of damage.
Trunks first uses it on Planet Luud to destroy the tiles Mutchy is throwing at him and Goku. He later uses it to kill Mutchy while he is absorbing Goku's energy. It is very similar to the Finish Buster used by Future Trunks.