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

• Rarity: Rare
• Finish: Normal
• Artist: Annie Stegg
• Card Text:
  When this creature enters, target creature you control gets +X/+0 until end of turn and up to one target creature an opponent controls gets -0/-X until end of turn, where X is the number of Elves you control plus the number of Elf cards in your graveyard.