Goblin Heelcutter is a common Creature — Goblin Berserker card from Fate Reforged (FRF), collector number 102. Current market price: $0.09 (foil $0.53), TCGplayer market prices via Scryfall.
Whenever this creature attacks, target creature can't block this turn. Dash {2}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)