Hornbash Mentor is a uncommon Creature — Human Warrior card from Ikoria: Lair of Behemoths (IKO), collector number 159. Current market price: $0.26 (foil $0.25), TCGplayer market prices via Scryfall.
When this creature enters, put a trample counter on target non-Human creature you control. {2}{G}, {T}: Put a +1/+1 counter on each creature you control with trample.