Mark of Heresy (Warhammer)

Former Empire solider Karl Hoche has spent his life hunting down the dark forces of Chaos. But after developing a mutation himself, Karl struggles to come to terms with becoming his own most hated enemy. Distraught, he reverts to what he knows best--the destruction of Chaos. But when he begins to garner a reputation as the near mythical Chaos Hunter, he becomes a more attractive target for those who seek out heretics.