18 years have passed since Nero joined Coolers army. Over those years planet Vegeta was destroyed and the majority of the Saiyans were killed by Frieza. Over those 18 years Nero's power level has gone up insanely surpassing Cooler and the Frost Demons. Nero didn't let Cooler know this because then he'd train seriously and achieve his golden form way too early. Since Nero had perfect Ki control he set his power level to 1,000,000 instead of his original power level of 700,000,000.
Cooler had made Nero his 2nd in command replacing Salza. For this reason Salza hated Nero and wanted to kill him but was too weak to do anything to him. At this time Nero's hair looked like Super Saiyan 4 but blond. Nero was thinking, "In a few more years Raditz will go to earth and fight Goku and Piccolo. What should I do until then?"
Nero looked at his dragon tattoo on his arm. "I've been practicing my dark fire dragon powers for years and have been making myself stronger but I can't stop now I'm not the strongest in this universe yet. Oh I know what I'll do. I'll become the God of Destruction and use the dragon balls to sever the connection I will have with those weak ass Kaioshins. Hehehe not that I could die anyways I'll just come back stronger."
Nero walks to his space pod and looks at the planet he was on. He smirks and gets in his pod. "This planet's inhabitants were weak not even worth my time but Cooler wanted it wiped so I did. Too bad my men were weak and died during the fight. Worthless weaklings."
His pod closes and flys up then heads to Cooler's planet. A few days later Nero gets out the ship and walks to where Cooler is waiting. "Lord Cooler another planet has been wiped but I'm the only one who survived..... again." Cooler looked at Nero and laughed. "You know you are the strongest in my army besides me try training your men more Nero. Maybe they won't die so fast."
Nero smirked. "Yeah sure they wouldn't last a day with me training them." Cooler looks at Nero and tells him to head out to a new mission. "You'll be working with Frieza's Saiyans Nero so please play nice they are weaker than you and don't show off too much." Nero laughs.
"I get to work with the King's weak ass son and Nappa hahaha ok Lord Cooler this will be fun." Then Nero walks to his pod and gets in and puts the destination Frieza's planet. He tells the system to pull up his stats.
Name: Nero
Sex: Male
Age: 18 years old
Power level: 700,000,000
Race: Saiyan
Bloodline: Dark Fire Dragon, Elites Saiyan
Transformations: Oozaru Transformation (10x multiplier), Dragon Transformation (50x multiplier)
Abilities: Zenkai, Immortal, Perfect Ki control, Regenerative power of the Goddess of Destruction
Skills: Dark Fire Dragon move set, Cooler move set
Reward Items: 1x Random Bloodline