Hopeful Initiate is a rare Creature — Human Warlock card from Innistrad: Crimson Vow Promos (PVOW), collector number 20p. Current market price: $0.49 (foil $0.50), TCGplayer market prices via Scryfall.
Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.) {2}{W}, Remove two +1/+1 counters from among creatures you control: Destroy target artifact or enchantment.