Toasting the Dead

 is a quest in.

Synopsis
Nyvardir, the self-appointed brewmaster of Harbingers' Watch, asked my help in perfecting his recipe for rymsjódda, a lager prized by pale elves for the fortification it provides against chills. Nyvardir believes that a simple addition could make his beer even more effective at staving off the cold.

Walkthrough
Possible rewards:


 * Finality's Claim
 * 4000 coins
 * 8000 coins with Diplomacy 14
 * Finality's Claim and 4000 coins with a Diplomacy 16

If you give him the antifreeze fluid he will promptly mix it in his brew and serve it to another Harbinger, killing him.

If you destroy the fluid after getting a reward he and all the NPC in Harbingers' Watch will turn hostile, ingluding Vatnir, if he is in your party.