Sacred 2:Strengthening Elixir for the Abbess
Talk to the Inquisition Informant. She will tell you her name is Leyania. She will ask you to deliver elixir to the Abbess Wilgyrien.
Take this elixir to the Abbess of the Order of the Seraphim!
Let me introduce myself: I am Leyania, and I'm here by order of the Inquisition. I think I can trust you since we're fighting for the same cause, if you get my meaning...
I've got a small and profitable job for you. There's an ancient Seraphim base not far from here. Of course the angels don't live there anymore, but now a ridiculous little order has settled there. The "women of the lovely Seraphim" are a bunch of spiritualistic crazy women. The Abbess is quite important to us though, one of our Priests managed to drive a Demon into her soul. Now she's possessed, but for us to control her completely she has to drink this elixir. Here is the vial, take it and give it to the Abbess. You won't regret it!
Work your way through the underground Monastery, watching out for ghosts, as they can sometimes be difficult to see. When you get to the end chamber talk to the possessed Abbess Wilgyrien to complete the quest and get your reward.
This... elixir is for me, right?! Alright I'll drink it. Yes, I will! I will leave this peaceful place soon, and diAAAAAARG! Sorry! ... the children of light will be destroyed! Here, take this as a small rAARGHARAHGR ... pardon... as a reward.