Menace (This creature can't be blocked except by two or more creatures.)
Whenever another creature dies, put a +1/+1 counter on Venom. If that creature was a Villain, draw a card.
Venom, Eddie Brock is a mono-black aristocrats/attrition deck that turns every death on the battlefield into growth and, with Villains around, card advantage. You flood the board with expendable bodies and sacrifice outlets, ping creatures off repeatedly, and grind opponents out while Venom snowballs into a menacing, hard-to-block finisher.
Free card advantage off Villain deaths keeps your hand stocked in long games
Venom grows huge automatically and menace makes it tough to block as a Voltron threat
Mono-black gives access to the format's best tutors, removal, and recursion
Synergizes with token swarms and sacrifice loops for relentless value
Single color limits ramp, card draw breadth, and interaction outside black's toolbox
Counters and triggers do nothing if Venom is removed or stuck in the command zone
Slow to start—needs a critical mass of dying creatures to pull ahead
Villain typed creatures are a small pool, so the draw clause is often inconsistent