>put the light in them, run the hell away to Astartes
You do what comes naturally- running! You put yourself ahead of Peg-Leg, tossing him the laspistol and taking aim at the reanimated cultists' legs and other locomotive limbs.
Since they are moving so slowly, it is painfully easy to put them back down. You two blast your way back to the Mess, using up two laspacks between the rifle and the pistol.
"YOU!" is your greeting from the daemon. "YOU ARE THE CAUSE OF ALL OF THIS!" It has been pushed more into the far corner by the efforts of the Astartes and the few Orks too stupid to flee.
It strikes at you with a tentacle made from hatred and copper filaments-
>roll 2d50 t-
An Astartes- the one without the helmet, you realize, grabs the cord with his powerfisted hand, and PULLS. The tentacle snaps in his mighty grip, and falls, harmless. The Daemon screams, leaking blue sorrow and liquefied liver from the injury site, and backs away a little more from the force of Marines pouring bullets into it- more of the shots are getting through it's impossible shielding, but that's not saying much. The cultists have reanimated in here as well, but they are easily cut down by the Marines and the Orks besides.
More tentacles spring up from the daemon, these made from glass and silicon- they lash about, cutting at Astartes, knocking them to the ground, slicing through their sacred Power Armor like a hot knife through heretics.
They go down, barking out litanies to resist pain, to resist corruption.
The daemon screams in rage again, and starts pulling itself back towards you, Peg-Leg, and the Sergeant Astartes.
>any ideas, geniuses?