The Deredeo pattern Dreadnought, with its formidable carrying capacity and battlefield stability, was used as a test-bed for a number of advanced weapon systems. Chief amongst its anti-vehicle armaments was the Arachnus Heavy Lascannon Battery. More powerful than any pattern of Lascannon regularly fielded by the Legiones Astartes, the Arachnus could inflict more damage with each hit than standard Las-weaponry.