Bloodstone Goblin is a common Creature — Goblin Warrior card from Dominaria (DOM), collector number 115. Current market price: $0.12 (foil $0.17), TCGplayer market prices via Scryfall.
Whenever you cast a spell, if that spell was kicked, this creature gets +1/+1 and gains menace until end of turn. (It can't be blocked except by two or more creatures.)