Asmira's prayers alone should have freed Mangara from the amber prison . . .

Visions

Relic Ward

You may choose to play Relic Ward as an instant; if you do, bury it at end of turn.
Enchanted artifact cannot be the target of spells or effects.

You may cast Relic Ward as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
Enchant artifact
Enchanted artifact has shroud. (It can't be the target of spells or abilities.)