Carnage tried to kill Toxin a few more times, but he managed to survive thanks to forming a temporary truce with Venom and later being aided by Spider-Man.
However, Mulligan was later murdered by Ghost Rider adversary Blackheart, and after bonding with Eddie Brock during a time when he was no longer Venom, Toxin is now joined with a teenager named Bren Walters.
Mulligan subsequently left his old life so he could properly handle being bonded with Toxin, and eventually he and the symbiote came to an understanding as they battled villains.
It was also clear that Patrick Mulligan had a strong moral compass, and Spidey inspired him to fight off the Toxin symbiote’s more monstrous urges and use his new powers to help others.