Trollbred Guardian is a uncommon Creature — Troll Frog Warrior card from The List (PLST), collector number RNA-148. Current market price: $0.12, TCGplayer market prices via Scryfall.
{2}{G}: Adapt 2. (If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.) Each creature you control with a +1/+1 counter on it has trample.