Battle for the Abyss

As Horus' betrayal becomes public, the galaxy is plunged into a critical conflict where loyalty is tested and divided. With some Legions siding with the Warmaster and others remaining loyal to the Emperor, the stakes rise as a formidable Wordbearers fleet approaches Ultramar, the stronghold of the Ultramarines. To protect their home and prevent catastrophic losses, the loyalist Astartes must intercept the enemy fleet and neutralize a powerful battleship.