Overgrowth Elemental is a uncommon Creature — Elemental card from Core Set 2020 (M20), collector number 187. Current market price: $0.30 (foil $0.36), TCGplayer market prices via Scryfall.
When this creature enters, put a +1/+1 counter on another target Elemental you control. Whenever another creature you control dies, you gain 1 life. If that creature was an Elemental, put a +1/+1 counter on this creature.