Temur War Shaman is a rare Creature — Human Shaman card from Murders at Karlov Manor Commander (MKC), collector number 187. Current market price: $0.23, TCGplayer market prices via Scryfall.
When this creature enters, manifest the top card of your library. (Put that card onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.) Whenever a permanent you control is turned face up, if it's a creature, you may have it fight target creature you don't control.