Does anyone think with this DLC that there is a bit too much vampire dust on offer. Mixed with a certain other ingredient (spoiler ommited) which has always been very common, it makes the availability of invisibility potions ridiculous. It does 2 things firstly it takes away the value of some special powers like shadow stone and secondly a good alchemist can make an absolute fortune selling them.

If you don't like it, don't use it. Personally, my alchemist is looking forward to this DLC.

Like the literal hundreds of free ingredients found in Valerica's room (which also contains a couple of dragon bones/scales), as well as the Boneyard.