You have been most helpful to me, $c.  I would reward you with the very recipe for the brew I gave you earlier... but I would ask of you a task that is quite dangerous.  Hear my request.$B$BThis lockbox contains three empty thaumaturgy vessels; they are imbued with an attunement aura that will drain the blood of a scorched guardian dragon.  Using one on the beast will anger it greatly, so be warned.  Once you have all three filled, bring them to me.$B$BDo this, and the recipe will be yours.