Examine all the traps northeast of the New Combine Outrider Camp to see which one was triggered. It will be selected randomly.
Pick up the unconscious scout in the trap
Return to Outrider Storian
Speak to Outrider Storian
Gather undead wards (5) from the barrels in the Eerie Encampment
Attack the barrels. They may not have a ward inside them - if they don't, you'll get an orange emote saying so. If they do, the ward is left where the barrel was and can be collected via left click
.png){kind=link}