Undergrowth Champion is a mythic Creature — Elemental card from Foundations Jumpstart (J25), collector number 736. Current market price: $0.38, TCGplayer market prices via Scryfall.
If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage and remove a +1/+1 counter from this creature. Landfall — Whenever a land you control enters, put a +1/+1 counter on this creature.