Courageous Goblin is a common Creature — Goblin card from Foundations (FDN), collector number 82. Current market price: $0.14 (foil $0.20), TCGplayer market prices via Scryfall.
Whenever this creature attacks while you control a creature with power 4 or greater, this creature gets +1/+0 and gains menace until end of turn. (It can't be blocked except by two or more creatures.)