After Zayne acquired the original copy of Green's SSS-rank Devouring Beast innate talent, he duplicated it first using XX-rank Equivalent Exchange before sacrificing it to the system, gaining another simulation chance.
After upgrading SSS-rank Devouring Beast to XX-rank, Zayne didn't stop there as he recalled that there was another innate talent that interested him.
In the Top Survivor Ranking, The Sixth was Vincent Blackwood, who held the title of Unkillable Cockroach. Unlike most people, he was a Zombie Overlord and not an Evolver Overlord.
As for why that happened, it was due to his SSS-rank innate talent, which was quite simple but powerful.
His SSS-rank Hyper Regeneration innate talent was what gave him that title, as even zombies that bit him only caused him to turn into a zombie, but his SSS-rank innate talent still took effect to retain his consciousness.
