Rejuvenating Metempsychosis

Enchant creature
If enchanted creature would be destroyed,
instead remove all damage from it and exile target creature card from your graveyard. When you do, enchanted creature's base power and toughness
become equal to the base power and toughness of
the exiled creature. Then, sacrifice Rejuvenating Metempsychosis.
New body. Same soul. Same purpose.