Seven days into the Mondronen occupation, the werewolf savages enacted some unknown type of blood ritual. A mystical, concussive force leveled the city from the center out, flattening most of the structures in town and killing hundreds. Only the outermost ring of Avabruck's buildings remained, forming a circular "henge" around the devastation within. Rescue attempts met with further werewolf attacks.

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PLANESWALKER'S GUIDE TO INNISTRAD: KESSIG AND WEREWOLVES