Command the Dreadhorde is a rare Sorcery card from War of the Spark Promos (PWAR), collector number 82s. Current market price: — (foil $2.06), TCGplayer market prices via Scryfall.
Choose any number of target creature and/or planeswalker cards in graveyards. Command the Dreadhorde deals damage to you equal to the total mana value of those cards. Put them onto the battlefield under your control.