At a young age something gets into Naruto. Something dark. Something evil. Something symbiotic. Rated M for language, violence, gore, adult themes, and possible lemons. Edited by SageUnlimited.

To save the lives of two dying out symbiotes, Naruto bonds with them and becomes a creature known as Catastrophe. With the powers of a spider on his side. Naruto show terror to his enemies.

No one knew where it came from, they only knew that when it arrived it was catastrophic. A corruptive, dark entity that bonded with what ever it possessed. It was only logical for Naruto to be it's host, he was full of anger and hate. The world would tremble, Venom is here. (AU/VENOM Crossover.)

On the Night of the Scroll incident, Naruto doesn't learn Kage Bunshin; instead, he finds a blood seal that looks like a mass of tendrils. Not knowing any better, Naruto opens this seal, and is greeted with a creature called a 'Symbiote.' As they speak, Kyuubi is devoured by the creature and Naruto attains every form of symbiote there has been.

Basically a NarutoxVenom crossover. I know it sound bad, but have I ever steered you wrong with crossovers before? Also this will be a harem. Who exactly? Wait and see!