Sporoloth Ancient is a common Creature — Fungus card from Modern Masters (MMA), collector number 163. Current market price: $0.31 (foil $0.32), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, put a spore counter on this creature. Creatures you control have "Remove two spore counters from this creature: Create a 1/1 green Saproling creature token."