The Diamat Incursion

"I will give you a lesson in honour."
– Holguin

When word of the battle of Isstvan III arrived, Lion El'Jonson's first move was to deny the traitor forces of the heavy siege engines produced in the Forge World of Diamat. However, on the planet, the Dark Angels discover that the Warmaster's influence has arrived further than they had guessed.

Relive this key moment of the Horus Heresy and discover a new Dark Angels warlord!