The Destroyer of the Math Gate has not been idle in the sun's turn since he nearly defeated the Fylking, his ancient enemies. Wounded, bitter and bent on reprisal, the immortal warlock has gathered an army. He has acquired a spell that will damage the veil between the worlds. And he is waiting.

The Fenrir Brotherhood is an ancient order of sorcerers who serve the Wolf Gods of the North. Haunted by a dark history, the brotherhood keeps to itself--or so it is generally believed. But the older something is, the more secrets it keeps, and the Wolf Lords have not only unleashed an army of demons across the land, but also let the Destroyer in.