The Dark Sign

Enchant Creature
Enchanted Creature has persist. (When this
permanent is put into a graveyard from the battlefield, if it had no -1/-1 counters on it,
return it to the battlefield under its owner's
control with a -1/-1 counter on it.)
When enchanted creature dies, return The Dark
Sign to its owner's hand.
Those branded with it are reborn after death, but will
one day lose their mind and go Hollow.