Dragon Ball: Sign In as Frieza, Claim the Super Saiyan Bloodline

Chu Mo transmigrates to the Dragon Ball world and, from the start, finds Trunks dying in the wasteland. He has just signed in and obtained Super Saiyan bloodline and tenfold combat power when the System issues a new mission: reach the Dragon Ball Z timeline within thirty days and sign in by touching Frieza's bald head! Trunks's Time Machine is out of power, so Chu Mo gets Bulma to rebuild one. He squeezes into the Hyperbolic Time Chamber and trains for a year, unlocking Super Saiyan 2!

When he arrives on Earth, he runs straight into Frieza, his father, and his brother swaggering around. Son Gohan, Vegeta, Krillin, and the others are so scared their legs go weak. Chu Mo drops from the sky and smashes their spaceship, then pins Frieza down by his bald head to complete the sign-in. He gets the Frost Demon race's ability to survive in a vacuum, twice Frieza's combat power, and telekinesis for free. A string of Death Balls sends King Cold and Cooler flying into oblivion on the spot, while not even a speck of Frieza remains!

Trunks stares in disbelief. "Is this guy a transmigrator too?" Vegeta grits his teeth and swears he'll become a Super Saiyan. Goku has just returned from Planet Yardrat when he runs into Chu Mo, and without a word, goes Super Saiyan and attacks. Chu Mo beats Goku down with one arm, forcing him to stack Kaioken on top of it.