Deathstalker (Deathstalker #2)

Deathstalker is now a member of the most elite military unit in the realms, assigned to protect and serve all kingdoms... who can pay. When he and his new best buddy Jotak are assigned to clean out the forgotten keep known as Grimvault, Deathstalker must use his particular wizard-murdering skills or fall victim to magic darker than his little black heart.