Corpsejack Menace is a rare Creature — Fungus card from Teenage Mutant Ninja Turtles Eternal (TMC), collector number 56. Current market price: $0.33, TCGplayer market prices via Scryfall.
If one or more +1/+1 counters would be put on a creature you control, twice that many +1/+1 counters are put on it instead.