Necroplasm is a rare Creature — Ooze card from Ravnica: City of Guilds (RAV), collector number 98. Current market price: $0.70 (foil $54.95), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, put a +1/+1 counter on this creature. At the beginning of your end step, destroy each creature with mana value equal to the number of +1/+1 counters on this creature. Dredge 2 (If you would draw a card, you may mill two cards instead. If you do, return this card from your graveyard to your hand.)