Frieza
Barely clinging to life but desperate to survive, Frieza begs and begs for mercy, which Goku hesitantly provides. Frieza's arrogance refuses to allow him to be beaten and saved by a Saiyan "monkey", and he expends what little energy he has left to attack Goku. Overcome with anger, Goku fires a Ki blast that consumes both Frieza and his attack, seemingly ending Frieza's reign over the universe.