Relenquished

{2}: If Relinquished is not enchanted, tap target creature. It becomes an aura in addition to it's other types enchanting Relenquished and cannot be untapped. Relinquished's power and toughness are equal to the current power and toughness of the creature enchanting it. (Activate only as a sorcery)

If Relinquished would be destroyed while it is enchanted, destroy all auras attached to it instead.