Takklemaggot

Enchant creature
At the beginning of the upkeep of enchanted creature's controller, put a -0/-1 counter on that creature.
When enchanted creature is put into a graveyard, that creature's controller returns a card named Takklemaggot from its owner's graveyard to play. If Takklemaggot can't be attached to a creature, it comes into play as an enchantment under that player's control with "At the beginning of your upkeep, Takklemaggot deals 1 damage to you" instead and it's no longer an Aura.