The cacophony that ensued when the sisters of battle entered the battle was deafening. A bit simple-mindedly Zuriel found himself mostly thinking. Shit shit shit shit...
He knew them from memory. True, he had never met, nor witnessed the sisters of battle in person. But he knew by heart that this was sisters of battle, of the order of our martyred lady.
His master must be laughing with glee when providing imagery of how these soldiers of the emperor slay heretics and psykers with ease and violent efficiency.
Zuriel knew that he had little chance against these soldiers, even less so when he came to think of that he wasn't even a very good battle psyker.

The bolter fire grew more intense and with the words of 'Stop! Hold your fire.' The dark angel seemed to have been downed.
Shit shit shit.
He threw his head around, looking for solutions. The way the sisters were coming from was obviously not an option, the side door probably still had several mutants of the hive mind arriving any minute and the direction he had come from seemed to be a bit too far away.
It was there he saw it, a massive closed blast door, with a control panel next to it.
He hadn't paid any heed to it when entering the room but now it looked like his best bet. Seeing he didn't want to be burnt by holy promethium fire.

With a few hurried steps he began to activate the control station, entered his mech-wright access code.
*Meep, access denied.* A sound followed by a mechanical voice and text on the little screen.
Ok, an older mech-wright access code.
*Meep, access denied.*
Zuriel was getting sweaty now, and just typed in a number which he recalled from nowhere.
*Meep, the adeptus arbites does not have access to this vessel.*
He punched the wall as he looked around him. A bolter shell struck up to the right of him and sent shrapnel flying. Zuriel cursed his dark master and tried another code.
*Meep, access denied.* Of course that didn't work, that was a laundry room code for a block house in hab block 3 on Paratella Secundus. How he knew that was obvious, seeing Zuriel had never been to Paratella.

-"Damn!" Zuriel let out with a frustrated yell, he kept pushing in codes with little success.