Gail Z. Martin 
War of Shadows 
Book 3 of the Ascendant Kingdoms Saga

Amidst the shadows, chaos reigns. Blaine "Mick" Mc Fadden managed to partially restore Donderath’s magic, but not without a cost. He and the magic are now bound together, and the power remains dangerous and erratic – draining the life from him with every use.New threats are rising from the wreckage of the battered kingdoms, and warlords both mortal and undead vie for control. Now, Blaine and his unlikely band of convict heroes must find allies amidst a seas of enemies, and discover a way to rebind magic to the will of mortals before it destroys him. And time is running out . . .