Festering Evil (WTH) from Weatherlight, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: John Matson
• Card Text:
  During your upkeep, Festering Evil deals 1 damage to each creature and player.
  BB, Sacrifice Festering Evil: Festering Evil deals 3 damage to each creature and player.