Kirtar's Wrath [Commander 2013]

Set: Commander 2013 Type: Sorcery Rarity: Rare Cost: {4}{W}{W} Destroy all creatures. They can't be regenerated.Threshold — If seven or more cards are in your graveyard, instead destroy all creatures, then create two 1/1 white Spirit creature tokens with flying. Creatures destroyed this way can't be regenerated.