[Dark Wilderness]
The mortal cultists are not psykers; Larukh left his thrall-wizards in he base. He himself is acutely aware of what has happened is here, of course. The sorcerer has put on his helmet while moving out, covering his face. The red visors of his helmet serve to make him feel even more inhuman and detached. The mortals are on edge, but sufficiently accustomed to the dangers of the Warp not to let that get to them yet. The Rubric Marine is, of course, without any emotion at all.
"The disturbance in the Warp must have been considerable," he informs the others over the comm. "We must be nearing the centre. Or I hope so, because if we're not, then the centre is worse still."
He reaches out with his mind, trying to probe the Warp in search of any daemons or other beings hiding in the forest.