Cancer

At the beginning of your upkeep, choose one:
Endless Proliferation: At the beginning of your upkeep, create a 2/0 black Infected token with "At the end of turn, sacrifice this creature. When this creature dies, create two 2/0 black Infected tokens with the same abilities."

Malignant Spread: At the beginning of each opponent's upkeep, that player gets a poison counter. If they already have 5 or more poison counters, they get an additional poison counter at the end of their turn.

“It grows. It spre