Temur War Shaman is a rare Creature — Human Shaman card from Magic Online Promos (PRM), collector number 55715.
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.