Tooth Collector (SOI) from Shadows over Innistrad, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Bud Cook
• Card Text:
  When Tooth Collector enters the battlefield, target creature an opponent controls gets -1/-1 until end of turn.
  Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, target creature that player controls gets -1/-1 until end of turn.