Defending the city from the forces of Chaos alongside hero's such as Mannfred von Carstein he was slain by the Bloodthirster Khar'zak'ghul but his soul was claimed by Sigmar to be reforged as a Stormcast Eternal.
The Bull-Hearts and eight other chambers were dispatched to the Realm of Shyish, each to search for one of the Nine Gates which would provide a way into the underworld of Stygxx and an audience with Nagash. 
In his search he found and freed Mannfred von Carstein who had been defeated and imprisoned by Taka Woebringer, an Exalted Deathbringer. Once the champion of Khorne had in turn suffered defeat, the vampire pledged to aid Tarsus in his quest. 
|Stand fast, Bull-Hearts. We have won a short reprieve, but they come again, in strength. Judicators, thin their ranks. Fall back when they reach the gaps. It’ll be close work then. Hammer and shield work, eh, my friends? Who will be Triumphant? …….Only the faithful. Stand Fast, and fight as if Sigmar himself were watching. Or as if Ramus were watching, for he’s closer.
- 1: The Prisoner of the Black Sun by Josh Reynolds
- 2: Soul Wars (novel) by Josh Reynolds Chapter Thirteen
- 3: The Realmgate Wars: The Lords of Helstone by Josh Reynolds