Brilliant Wings

Most protective auras carry a built-in liability: kill the host and the aura follows it to the graveyard, and no amount of hexproof stops that exchange. This one does not escape that fate. When the enchanted creature dies, the aura hits the graveyard as a state-based action and its migration trigger goes dark the instant it leaves the battlefield. The compensation is portability while the host lives. Every time another creature you control enters, you may pay a single mana and slide the flying-and-hexproof package onto that fresh body, so the protection tracks whichever threat matters most rather than staying wedded to your first pick. Flash is the timing multiplier: hold it up and you can grant hexproof in response to a targeted removal spell at the exact moment it saves the creature, or grant evasion before blockers are declared to slip a threat past the defense. The recurring migration cost is what keeps the effect from snowballing for free, since each hop demands both a new creature entering and a mana to move it. The strategic axis, then, is not durability on one creature but continuity across a sequence of them: the aura wants a board that keeps replenishing, so you can relocate before removal catches the current host. Once that host dies, the aura falls with it and the chain has to be rebuilt from a fresh cast.