Yea the ale seems to drop in NP sewers from the ratmen, I got mine pretty easily actually while collecting hoods and ratman tails for NP faction quests. I am on the third part of this questline where I have to gather 4 Sigil's of Unmaking, which is a pain cause I have yet to get one to drop in BB. But I was actually wondering how many quests are in this line, and what are the future rewards if anyone knows. So far I have gotten
Explosive Flame Helmet
Head
AC 5
Cha 2 Int 2 Agi 2 Hp 15 SV Fire 3
Class Mag
and..
Explosive Flame Elbow Pads
Arms
Ac 5
Sta 2 Int 1 Mana 10 Sv Fire 2
Class Mag
I am hoping that the end result is a robe of some sort, and wondering if those Wet soaked ratment glovs and shirts and things are for other quests in this series. If anyone has done this quest line I would appreciate any knowledge you might have about it. I have seen nothing on the wiki as of yet.