Erdona, Goddess of Souls

Indestructible
Whenever a creature would be put into your graveyard from the battlefield, you may pay {x} and return it to the battlefield at the
beginning of the next endstep with +1/+1. That
creature is a spirit in addition to its other creature
types. {x} is equal to that creature's converted
mana cost plus 1
Erdona told the humans that there was life after death, just not the kind they were accustomed to