Celestial Armory
Enchantment (R)
Auras that can enchant creatures can also enchant this enchantment.
Pay the mana cost of an aura enchanting this enchantment: move it to a target eligible permanent. Use this ability only as sorcery.
Whenever an enchanted creature you control leaves the battlefield, you may move it's auras here instead of discarding them.

Are you super attached to the auras staying on the battlefield? I think you could achieve a similar effect with a more conventional wording:

Celestial Armory W
Enchantment
Whenever an Aura you control is put into a graveyard from the battlefield, if it wasn't attached to a permanent or player, exile that card.
You may cast cards exiled with Celestial Armory.