Aurvaeus, Nyx Favored

Bestow {2}{w}{u}{b}{r}{g} (If you cast this card for its
bestow cost, it’s an Aura spell with enchant creature.
It becomes a creature again if it’s not attached to a creature.)
Enchanted creature gets +4/+4.
When Aurvaeus, Nyx Favored enters the battlefield, exile each creature you control with bestow, then return those cards to the battlefield
as enchantment auras attached to this creature. If Aurvaeus, Nyx Favored is an aura, instead attach
those cards to enchanted creature.