Ground Pounder is a common Creature — Goblin Warrior card from Unstable (UST), collector number 110. Current market price: $0.12 (foil $0.69), TCGplayer market prices via Scryfall.
{3}{G}: Roll a six-sided die. This creature gets +X/+X until end of turn, where X is the result. Whenever you roll a 5 or higher on a die, this creature gains trample until end of turn.