"Adrianne, I heard you yell the name Zirael while inside of the Rhino, moments before we were attacked. Who is this Zirael and how do they or it tie into all of what is happening around us?"
"Eh, it's the whispers of the warp. The barrier to the immaterium is weakening in the proximity of the ritual, allowing the voices from beyond to reach through." Adrianne replied, which; to a certain degree; was the truth.
With the barrier to the warp so weak, even the blunts in the group could hear the ethereal whispering voices if they listened closely, or see bizarre and hideous forms move about in the reflection of pools of water. Which meant Adrianne felt confident they would believe the story, even if it was only a half truth.
On the other hand; Adrianne; being a fully fledged Psyker, saw them surrounded by shadowy forms that eyed them with predatory malice from beyond the veil, walking among them with impatience!
They had an audience on the other side of the warp, which was jeering for their attention as the barrier steadily became weaker...
Adrianne had seen enough unreal horrors stalk the dark to be moved to be moved by the sight, and she was used to listening to the constant begging of things beyond the mortal realm whispering in her ear. But the fact that there was one voice in particular that was stronger than the rest; and even eerily familiar; was enough to cause her to feel a sense of discomfort.
"Ohh, there is no reason to be shy! I am sure your 'friends' won't judge whom you share your company with. Besides, we will meet soon... I have foreseen it!"
"Ughh... " Adrianne groaned, stifling a rebuke as she instead focused on the guardsman.
"I second the krieger's voice; we need an ace in the sleeve if we are to have any real chance of success. Otherwise we are throwing the dice of fate and praying to the emperor for a double sixes."
One thing Adrianne had always appreciated of the guard; especially their veterans; was their healthy respect for practical caution. From what she knew, it was said a smart guardsman would never as much as pick up his dinner fork without ample air and fire support to back him up. If a shelling from many kilometers away could do the job of an otherwise heroic charge, you called the artillery officer rather than the regiment commissar!
And deep down; Adrianne thought as she looked at Aviza; she hoped their Sister of Battle had a squad of Deathwatch marines in her pocket or something for when they encountered a situation as grave as this!