Frieza and Cooler were trading blows. Frieza had finally started using his full power against Cooler due to Cooler pushing him back strength wise. As they were fighting Zarbon had transformed to his ugly self and was fighting Salza. Dodoria was fighting Dore and Neiz. The rest of the army's were fighting and shooting each other.
Frieza had grabbed Cooler by the tail and swung him towards the ground while sending a "Death Beam" down with him. Cooler moved to the side and shot up hitting Frieza hard on his chest with his head. Somewhere on the other side of the planet Nero was charging a small white ball with white lightning and making it vibrate fast. Nero finishes and flys to where some soldiers are. He throws it right into the fighting crowd and Boom!
Nero smiles and saw that a huge crater was now there with all the soldiers that were there now dead. Cooler was so focused on fighting Frieza that he didn't notice. Nero then landed and his claws where covered in black flames infused with Hakai energy. "Amaterasu Claws of the Hakaishin King" Nero started running and slicing soldiers left and right. As they were cut in half their body's burned away and left no trace of ash or anything.
Nero killed everyone on one half of the planet making sure no one reported to anyone about what's happening. After a few minutes everyone was dead except for Frieza and Cooler who after awhile noticed the silence around them. Nero walked in front of them and had Salza in his grip by the head. "C-Cooler he was too strong for us to handle." Nero crushed his head then made his body disappear without any ash.
"I've been waiting to kill him for years. Hello Master Cooler it's been awhile huh."