This a new version of the warlock Madrak Ironhide presented in Forces of HORDES: Trollbloods Command.

The iconic Trollblood chieftain Madrak Ironhide returns. Having finally freed himself of the cursed axe Rathrok, the latest version of Madrak trades in brute aggression for stalwart defense. Nowhere is this more apparent than in his feat Rallying Cry that boosts the Trollbloods' already legendary toughness, preventing friendly Faction models from becoming knocked down; causing Tough rolls to pass on a 4, 5, or 6; and allowing models who successfully pass a Tough roll to advance 3". In addition, Madrak has the Protective Aura ability, allowing him to grant the same protection to his army as a Krielstone Bearer & Stone Scribe unit!