Bloodstoke Howler is a common Creature — Beast card from Legions (LGN), collector number 89. Current market price: $0.11 (foil $0.74), TCGplayer market prices via Scryfall.
Morph {6}{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.) When this creature is turned face up, Beast creatures you control get +3/+0 until end of turn.