Thallid Devourer is a uncommon Creature — Fungus card from Fallen Empires (FEM), collector number 75. Current market price: $0.34, TCGplayer market prices via Scryfall.
At the beginning of your upkeep, put a spore counter on this creature. Remove three spore counters from this creature: Create a 1/1 green Saproling creature token. Sacrifice a Saproling: This creature gets +1/+2 until end of turn.