If Starlit Mantle leaves the battlefield before its enters-the-battlefield triggered ability resolves, the creature it last enchanted before it left gains hexproof until end of turn.
Flash (You may cast this spell any time you could cast an instant.)
Enchant creature you control
When this Aura enters, enchanted creature gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)
