Takklemaggot (CHR) from Chronicles, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Daniel Gelon
• Card Text:
  During target creature’s controller’s upkeep, put a -0/-1 counter on that creature. If the creature is put into the graveyard, its controller chooses a new target creature for Takklemaggot. If there are no legal targets, Takklemaggot becomes an enchantment; during his or her upkeep, Takklemaggot deals 1 damage to the controller of the last creature Takklemaggot enchanted. Control of Takklemaggot does not change when its target changes or when it becomes an enchantment.