Goblin Taskmaster is a common Creature — Goblin card from Onslaught (ONS), collector number 210. Current market price: $0.15 (foil $0.49), TCGplayer market prices via Scryfall.
{1}{R}: Target Goblin creature gets +1/+0 until end of turn. Morph {R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)