I got Oppression of Thule:Permanent this morning while fighting Fright, in Fear Itself. It was not removable. I tried repeated castings of several different level 105 Druid and Cleric cures with no effect. Radiant Cure 9 also does not touch it. I tried completely logging out of the game. No change. I ultimately had to kill myself to get it to go away.
It capped my HP at 70% and Mana at 25%. While I was fighting Fright, I popped Staunch Recovery (6th year Veteran AA) but it only took my HP to 70% and Mana to 25%.
A guildie suggested this may be a replacement for his Harm Touch.
Dru
Prexus (The Rathe)