Lanius' dark thoughts weren't quite finished when the catastrophe happened. For a moment, he felt paralysed, unable to move while he relived some of the horrors of the war again. 'On your feet soldier' He suddenly remembered the mantra, that had been hammered into his mind again and again 'your squad mates rely on you'. That broke the spell. Still shaking, Lanius got up. It felt as if he was moving through molasses, every movement a fight against an invisible current threatening to ripp him off his feet.
Discipline. That's why you train. That's why you do things again and again until you don't have to think about them and can leave your body to take care.
So first things first. Get a light. Save your mates.
Aelia had taken care of the torch under the cart, so he drew a torch from his backpack and gave it a little magic to ignite the oiled wick. With large steps, he moved towards the fallen Bok, waving the torch around to dislodge the leaching shadows. "ON YOUR FEET. SHOW THOSE BASTARDS WHAT YOU ARE MADE OFF!"
The first words had sounded faintly strangled, but the war cry, so often shouted so often heard, came nearly automatically over his lips.

Spoiler: Actions
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Object interaction: Pull out torch
Action: Prestidigitation to light torch
Move: Towards Bok to get the shadows to back off