The Supernova is a more powerful version of the Death Ball and is Frieza and Cooler's strongest attack. The user starts by raising his hand or finger and gathers their energy in the form of a giant yellow-orange, sun-like energy sphere. Like the normal Death Ball, it is mostly used to destroy planets, or as a last ditch-effort to kill an enemy.
History and usage
Main article: Trunks Saga When Future Trunks had transformed into a Super Saiyan and easily blocked Mecha Frieza's attacks, the robotic tyrant flew in the air and launched the deadly Supernova, attempting to destroy Earth just as he tried to destroy Planet Namek. However, Trunks had caught the attack without harm. Annoyed at this act, Frieza fired a blast at the Supernova, which caused it to explode. Fortunately, Trunks teleported away from the blast and while Frieza was caught off-guard, Trunks killed the tyrant with the Shining Sword Attack.
Bardock: The Father of Goku
Main article: Bardock: The Father of Goku Frieza had learned of the Saiyans' rapidly growing strength and decided to eradicate them, out of fear that they would have the power to become Super Saiyans and defeat him. When Bardock attempted to kill Frieza with the Final Spirit Cannon for the murder of his comrades because of Frieza's betrayal, the tyrant countered with his Supernova. The attack had killed Bardock and destroyed Planet Vegeta as well as the entire Saiyan race. (Other Saiyans had survived though, ex. Goku, Vegeta, Table, Nappa, Raditz, Turles, Broly, and Paragus.)
Main article: Cooler's Revenge When Cooler's final form proved to be too much for Goku to handle, Goku's rage and desperation transformed him into his Super Saiyan form. Battered around and overpowered by Super Saiyan Goku, Cooler launched his Supernova intent on destroying Goku along with the Earth (he even mentions he can gather his energy much faster than Frieza). However, Goku manages to push it back with a Super Kamehameha, sending Cooler and his Supernova into the Sun and it seems that he is destroyed. However in the movie Return of Cooler, we find out that Cooler had survived the blast with only half of his head still remaining attached to the Big Gete Star, where he produces thousands and thousands of mechanical clones of himself to combat Goku and Vegeta.
Return of Cooler
Main article: Return of Cooler When Cooler had been revived by the Big Gete Star as Metal Cooler on New Namek, he outclassed Goku due to his new regenerative ability and Instant Transmission technique. Wanting to end the fight, Meta-Cooler launched another Supernova to kill Goku, who at the last second teleported away from the blast via Instant Transmission.Note that Meta-Cooler's Supernova wasn't as powerful as the one he used against Goku on Earth. The other Supernova had enough power to destroy the Earth, while this Supernova merely caused a giant explosion on New Namek instead of destroying it.