Zuggtmoy's Gift

Enchant creature
At the beginning of enchanted creature's
controller's upkeep, put a -1/-1 counter on
enchanted creature.
Whenever enchanted creature dies, sacrifice a
land. If a swamp was sacrificed this way, return
this card from your graveyard to your hand. If a
forest was sacrificed, create X 1/1 green plant
tokens where X is the mana value of the creature.