Kirtar's Wrath (CMM) from Commander Masters, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Kev Walker
• Card Text:
  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.