Toothless by J. P. Moore

France, 1180 AD: an ancient evil is on the march. The Black Yew leads an army of demons through Europe, laying waste with a devastating plague and destroying the relics of Christendom. After losing his wife and daughter, a failed Templar rejoins his comrades in the crusade against the Yew's army. But the dice are cast against the living, and the Black Yew's demons slay him, impressing his reanimated corpse into their ranks. He is gifted. He shows great promise as a servant to the Yew. But life is not yet done with him.