Now is a good time to buy some ingredients and replace any potions you used up - in particular health potions - and you should see to your other kit so you are well prepared. The objectives for this quest are the Ring of the Beast and the Ring of the Erudite, both of which are powerful rings that augment a Vampire Lord's special abilities while transformed and also increase their attributes while in humanoid form - so if the vampire side is the side of the expansion you have chosen for your main play-through these would be very good to have. You should go ahead and go through the chat options to learn about the rings, it is an interesting story, and once you are done and ready, go ahead and hit the door!
When you speak with Feran he tells you that he has discovered a pair of ancient rings of Blood Magic - and this flags the RINGS OF BLOOD MAGIC quest.
