I’m probably completely wrong but what if? I believe it’s plausible, Rezyl was a hero. As we all know thanks to batman “you either die a hero or live long enough to see yourself become the villain”. So after leaving the hellmouth and falling to the darkness, Rezyl now dredgen yor commits numerous attrosities and becomes a villain. This villain eventually over comes the darkness that has taken him. Filled with dispare for the crimes he has committed he hatches a plan. A plan to stop any other guardian from walking the path he did and falling to darkness. The events of Palamon are documented poorly as yor told them to leave and burned the town to the ground leaving it in ruins. There was no gun fight between Jaren Ward and yor. It was a lie, a set up for Shin Malphur. The events at dwindlers ridge a hoax. All so that Rezyl could lose the name Dredgen Yor and come out as Shin Malphur. Which would be appropriate as shin literally means new. This allows Rezyl to carry out his plan and stop another guardian making his mistakes. No one will accept him as Rezyl or Yor after everything he has done. No one can forgive that no matter what he does to right those wrongs. His only choice was to re-invent himself as a beacon of light a warning to those willing to wield the darkness. When you find the melted husk in the EDZ the camp has 3 dead guardians at it. What if the guardians had fallen to the dark and Shin/Rezyl put them down but the thorn is actually Rezyls and he is giving it to us like he did the last word? The stranger we see on the derelict with drifter in the invitation of the 9 cut scene is also Rezyl in yet another disguise.