The Doom Blaster is a Super-heavy Daemon Engine of Khorne and act as a giant artillery piece. Other than its goofy skull/pincer face, it is one of the few slightly good looking Khorne daemon engine model for Epic, although it is not that much of a accomplishment.
The Doom Blaster is equipped with the quad-mounted Doom Mortars which are able to lob a thunderous carpet of shrapnel-packed shells amongst the enemy targets, a set of twin-linked Heavy Bolters on the front of the machine, alongside a battle scythe (The goofy looking pincers at the front) that can slash apart the bodies of any enemy units that get too close.
The Doom Blaster, like all Khornate Daemon Engines, is also outfitted with the protective Runes of the Blood God upon its hull. These runes make the vehicle almost indestructible by way of psychic attack.
Overall for an artillery piece, it is surprisingly competent in defending itself from would-be attackers.