Apocalypse: I Have a System from the Start

He starts out transmigrating into the apocalypse with a game System. He uses it to fight monsters, level up, and unlock game items as he battles through the apocalypse, then randomly transmigrates to worlds across the heavens.

"Help! Zombies! Run!"

"I've awakened a superpower! Take this, a little fireball?!!"

"Watch this: Water Style, Water Dragon Jutsu!"

"You call that tiny water arrow a water dragon? You're killing me!"

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.