If an Aura can be returned to the battlefield with Open the Vaults, it must be, even if its owner doesn't like what it would enchant.
Open the Vaults
If an Aura is put onto the battlefield without being cast, the Aura's controller-to-be chooses what it will enchant as it enters the battlefield. An Aura put onto the battlefield this way doesn't target anything (so it could be attached to an opponent's permanent with hexproof, for example), but the Aura's enchant ability restricts what it can be attached to. If the Aura can't legally be attached to anything, it remains in its current zone.
An Aura put onto the battlefield this way can't enchant an artifact or enchantment that's also being put onto the battlefield with Open the Vaults.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Ilker Yildiz
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
