Sanctuary of Aria

Instant -

: Prevent the next 1 damage that would be dealt to you this turn by a source of your choice. Destroy this at the beginning of the end phase.

Sanctuary of Aria is a macro that is available to each player in Rosetta limited formats, which includes the draft, sealed, and blitz pre-constructed deck formats. When you begin a game in one of these Rosetta limited formats, each player places a Sanctuary of Aria into the arena before you reveal your heroes.
Sanctuary of Aria is neither a card nor a token. It is a game object that the player controls and exists in the arena with an activated ability that generates a shielding-prevention effect.
You choose the source you would like to prevent the next 1 damage from when the activated layer resolves on the stack. Once you’ve chosen the source to prevent damage from, it cannot be changed.
You may activate this as many times as you would like, provided you have the necessary resources to activate this ability.
If the source you chose with Sanctuary of Aria’s prevention effect deals damage to you that cannot be prevented, the prevention effect can be applied to the next damage from that chosen source that can be prevented.
You cannot name Sanctuary of Aria for effects that require you to name a card.
You cannot choose Sanctuary of Aria for effects that allow you to choose card/tokens. Similarly, you cannot target it for effects that require a target card/token.
When Sanctuary of Aria leaves the arena, it ceases to exist.