Result: Scytulus Megabattle at XMax

Dragonriders Chapter Space Marine Master Elias, ably supported by dreadnoughts Orion and Braxxas (who seismic-hammered a Brass Scorpion into the warp); Warden Midas of the Penal Imperial Guard; and crack shot Imperial Guard Captain Daniel rallied to the defense of the citizenry of Scytulus III, it's towering Imperium buildings falling to pieces as the planet shook and the skies turned to blood, leaving the survivors huddling in the intact medieval stonework structures in the old city. The fighting was door-to-door and hand-to-hand as daemonic minions of Tzeentchian Lord Kerracch, Bloodthirster Kubrash and their Traitor minions--including two superheavy Brass Scorpions and a fallen Shadowsword--used the unexplained catastrophe befalling the planet to step through the sundered reality and reap souls.

At the end, the underdog Defenders, with no superheavies of their own to counter the attackers, wildly outnumbered and outgunned, fell to Ruin, withdrawing with such citizenry as they could protect to regroup. The hideous cackling of triumphant daemonry dogged their retreat, along with the lamentations of the captured...including initiates of several Space Marine chapters which recruit from the feudal Scytulus population...

And the mystery of the Apocalypse befalling Scytulus III remains...