The idea is to make the War Altar optional and to make him the most powerful priest, both spiritual (hence free power die) and martial.
Grand Theogonist Volkmar, 260 points, Lord (0 - 1)
M WS BS S T W I A Ld
4 5 3 4 4 3 4 2 9
+100 War Altar with 2 Warhorses; 4+ Ward Save, Bound Level 5 spell from the Lore of Light (1), Chariot, Large Target, Magic Resistance (2), Swiftstride, Unbreakable
5 5 5
Requirements: Grand Army & vs. Forces of Destruction
Special Rules: Blessings of Sigmar (2), Frenzy, Righteous Fury (12”), Prayers of Sigmar (2, add a free power die to every Prayer cast by the Grand Theogonist)
Upgrades
free Hand Weapon
The Horn of Sigismund; When Charging the War Alter causes terror till the end of that turn.
The Jade Griffon; Whilst on the War Altar the Grand Theogonist regains lost wounds on a 5+ during your movement phase, otherwise 5+ Regeneration.
The Staff of Command; Whilst on the War Alter the Grand Theogonist gets +2 Strength, otherwise +1 Strength.