Kabuto, the Cosmos’ Chosen

Bestow{1}{u/b}{b/g}
Doublestrike
So long as Kabuto is on the battlefield,
Auras you control have Aura Swap {1}{u/b}{b/g}.
(Exchange this Aura with an Aura card in your hand.)
Enchanted creature gets +3/+2 and Doublestrike