Mystic Sanctuary is one of the best cards from Throne of Eldraine in eternal formats, because it can be fetched with fetchlands and guarantee a strong draw step. The cost is that it requires islands, which means everything dies to Boil. It's especially bad since Boil is instant speed.
Is there a way to play Mystic Sanctuary and not automatically lose to Boil if it resolves? Right now all the options I'm seeing are subpar:
- Force of Negation could counter Boil (it must be Force of Negation since Boil is instant speed, it can cast in response the blue deck doing whatever at the end of the Boil player's turn), but it is obviously not a good solution since it's an inherent 2-for-1, and it's often not great against the rest of the Boil player's deck either.
- There are a variety of blue-producing lands that are not Islands, e.g. Glacial Fortress. But they don't trigger Mystic Sanctuary.
- Mana rocks such as Talisman of Progress could produce blue mana, but they're also not ideal because blue decks typically do not want mana rocks.
I'm looking for cards that can be played either maindeck or sideboard that will help the Mystic Sanctuary deck beat Boil. The format is Modern.