I'm not sure if this is a bug even if what I think is happening really is (happening).
I went to the mines, got some tenebrium ore, left the mines, handed it over and got tenebrium skill. Then I went to Loic and got permission to do the initiation.
When I got to the end of the black corridor my characters acted as though they were getting Rot but I see no actual sign of it. Am I in fact immune to it because I have tenebrium skill (I would expect so)? In this case, should the characters say "Well I wonder what that mist was supposed to do?" or something?
Or do I in fact have the rot as some special override of tenebrium skill? There's no icon next to my characters' pictures and they don't seem to be losing HP.