Anime Crossover: Reborn as Cell, and Tornado Wants to Kill Me from the Start

I just transmigrated as Cell, the strongest villain in Dragon Ball, only to find myself a germinal form without arms or legs?! 【Ding! The Myriad Worlds Growth System has been activated!】 【Host is in mortal danger. Initiating dimensional transfer... Destination: the One-Punch Man world!】 Other transmigrators can dominate everything in an instant. I have to scavenge corpses behind the monster battlefield and quietly grow stronger. As long as I absorb life energy, I can evolve without limit! 【Absorbed ordinary-grade life energy! Evolution progress +1!】 【Current stage: First Form metamorphosis progress (1/10000)!】 Just as I was enjoying the thrill of getting free energy, a green-haired, arrogant little girl floated over my head. Terrible green psychic energy flickered at Tornado of Terror's fingertips. “What a disgusting monster. I might as well kill it.” Hey, lady, I haven't even finished growing yet!