Halsted swore quite passionately under his breath, the after-image of the las shot still flashing across his vision even as he snatched up his magnoculars and scanned the direction where the shot had come from for the possible source.
"Emperor's Blood... I think we've got someone else coming to crash the party," he muttered under his breath. "Infantry moving up, definitely not DuPont's men, backed by a scout sentinel with a lascannon," he informed the rest of the group, save Pass who'd gone out of earshot by now, most likely. "Definitely not Skitarii either - looks almost like a Guard regiment, but I don't recognise the regimental colours... Red and gold field, Cult Mechanicus cog design with a figure of the Emperor enscribed in it... ring a bell to any of you folks?" he asked, then ducked down. "Question being, can we ask them for fire support, or are we getting stuck in the middle of a rival cult fight?"