Winnowing (ECL) from Lorwyn Eclipsed, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: David Palumbo
• Card Text:
  Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 1 or one mana of that creature's color.)
  For each player, you choose a creature that player controls. Then each player sacrifices all other creatures they control that don't share a creature type with the chosen creature they control.