Venom: a symbiotic life form that embodies all of Spider-Man's powers in one terrifying dark vision... Spider-Man rejects the sentient alien life form that had become his all-powerful iconic black costume, and the sinister creature is forced to find a new victim. Consumed with hatred for Spider-Man, a trait it shares with its new host - Eddie Brock, the wall-crawler's deadliest enemy is born...
The Amazing Spider-Man #252, 256-259 + 300, Web Of Spider-Man #1 and excerpt from The Amazing Spider-Man #299
