Head up the slope you just came down and over to the West. Get to the next search area and look around for the Guardian Wraith. Once again, get through its shield and weaken it. It will transform into a Corrosive Wraith. Weaken it then throw the Monster Ball at it to capture it.
You can now collect the Trapped Corrosive Wraith.
Guardian Hunter Mission Objectives
- Capture Fire Wraith
- Capture Corrosive Wraith
- Capture Shock Wraith
- Capture Cyro Wraith
- Go to pick-up point
- Kill the Master Poacher or Deliver Wraiths to Master Poacher
Turn in: Sterwin