Ponyback Brigade is a common Creature — Goblin Warrior card from Khans of Tarkir (KTK), collector number 191. Current market price: $0.06 (foil $0.40), TCGplayer market prices via Scryfall.
When this creature enters or is turned face up, create three 1/1 red Goblin creature tokens. Morph {2}{R}{W}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)