Tibs said:
Getting a 14-cast seems like an interesting challenge. Too bad Azathoth doesn't care...
It could be a mutually-assured destruction scenario: destroy Azathoth and the world.
Actually, all that's left to get to make this work is some item, power, or such like that cancels an Ancient One's Start of Battle power. Given the usefulness of that against a whole range of Ancient Ones, I would expect a Mission on the difficulty level of Walking The Ley Lines would be about the only fair way to do it. Or perhaps an Inner Sanctum encounter with a difficult Lore check plus sacrificing an Elder Sign.
With that, you get one turn to destroy Azathoth before their attack takes effect and destroys the world anyway.
There's nothing yet that can do it, and I suspect there never will be.