Talisman: The Horus Heresy - Shadow Crusade

The Shadow Crusade has begun. While the Ultramarines reel from the Traitor surprise attack on Calth, Lorgar and the rest of the Word Bearers strike deep into the realm of Ultramar. Their unlikely allies, Angron and the World Eaters, continue to ravage each new system they come across.

The Shadow Crusade allows the player to explore the events of The Horus Heresy around the Ultramar System in more detail and play as the Warlords and Legions that fought there.

The Expansion includes 6 new Warlords for you to play. Each Warlord also comes with their custom Legion Dataslates.
For the Traitors:

LORGAR AURELIAN
The Golden Son, Master of the Word Bearers.
ZARDU LAYAK
The Crimson Apostle.

For the Loyalists:
CAPTAIN REMUS VENTANUS
The Saviour of Calth.
TYLOS RUBIO
A trusted Member of Leman Russ’ own Einherjar.Knight Errant, former Codicer of the Ultramarines.

Both Loyalist and Traitor may also play as a Legion Forge Lord, or the Legion Primus Medicae.\n\
The Campaign also includes new Stratagems, Places, Strangers and Events for the player to explore.

Please note that this expansion is included in the Season Pass.

Source: Steam Store Description