Undying Servitude

If successfully cast, pick 1 enemy HERO with a Wounds characteristic of 6 or less within range and visible to the caster. That unit suffers D3 mortal wounds. If that HERO is slain by this spell, before removing that HERO from play, you can add 1 Vampire Lord to your army. Set up that unit within 3" of the slain HERO, and then remove the slain HERO from play.