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Cat could probably enter apothesis here and drive the dwarves out as the fey version of the King of the Dead if she wanted. Heck she could probably drive the dwarves out, become a minor god, and gate the population of Callow to the underdark where they would be safe if she wanted.

The dwarves only have 100,000 people with no supply line, it is likely the easier war than fighting Procer and Praes at the same time.