Mardu Siegebreaker is a rare Creature — Human Warrior card from Tarkir: Dragonstorm Promos (PTDM), collector number 206p. Current market price: $0.37 (foil $0.40), TCGplayer market prices via Scryfall.
Deathtouch, haste When this creature enters, exile up to one other target creature you control until this creature leaves the battlefield. Whenever this creature attacks, for each opponent, create a tapped token that's a copy of the exiled card attacking that opponent. At the beginning of your next end step, sacrifice those tokens.