Fury of the Horde is a rare Sorcery card from Duel Decks: Speed vs. Cunning (DDN), collector number 30. Current market price: $6.05, TCGplayer market prices via Scryfall.
You may exile two red cards from your hand rather than pay this spell's mana cost. Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase.