[Under normal circumstances he would probably lick it. Maybe best for all of them he hasn't yet gone off the deep end.]

Might be wise to see if we can replicate it. Yennefer, if she's not busy. Mildred at the Winking Cauldron may be able to help otherwise.

It may just be what they had 'on hand' to make the substance with, and not ahhh... necessary for a spell. [What? Blood is certainly 'on hand' plenty.] But if there is a use that we can repurpose, we don't want to run out while we test it.