Naruto: Evolution of the Ten Thousand Beasts

A flea from the start, a god-devourer in the end!

In the meat grinder of the Third Shinobi World War, the orphan Yagami Gen, born with zero talent, was cast aside by Konoha's cannon fodder unit. He had no money, no bloodline, and no chakra, only the leaping ability he stole from a flea and the monstrous strength he took from an ant. While Kakashi flashed with lightning on the battlefield, he tore enemies apart with his bare hands. While Might Guy opened the Eight Gates, he quietly took a lethal blow in his place.

But no one knew that he was the real "monster" on the battlefield.

"I can't use ninjutsu, but I can punch Susanoo into smithereens."

"I'm not a jinchuriki, but the Ten-Tails is just a snack to me."