Thallid Germinator is a common Creature — Fungus card from Modern Masters (MMA), collector number 168. Current market price: $0.22 (foil $0.47), 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: Target creature gets +1/+1 until end of turn.