I found Carol and finished the quest!
Thanks for that help.
As for mardanius again, the only three options I get is the following:
1. Can you explain me why you've got problems with the source?
2. Can you heal me?
3. If I need something, I'll come back again.
So is it completely screwed up? Or is there still a chance?
Since I'm like 20H into the game on the same play through I'm really not in the mood to start all over. But it still annoys me greatly that there seems to be no way in finding a solution to this otherwise.... : /
