Stage requirements:

Completed the quest "The Dragon Curse"

Dialogs:

NPC:/talk I'm saddened to hear that his tribe is also afflicted with nightmares and such, but this Purified Water should at least buy us some more time.

NPC:/talk While you were gone, I completed my study on the water sample you collected and can now confirm that there are traces of a new, yet unknown substance in it.

NPC:/talk You however confirmed with Mian that they did not drink any of the water, which means that IF this unknown substance is to blame, it was ingested otherwise.

NPC:/talk I suppose this is the way of science. For every answer you discover, 10 new questions surface, but I'm not ready to give up yet.

NPC:/talk This investigation is turning into a larger undertaking with every step we take and I don't expect you to sacrifice any more of your time, unless you wish to do so yourself.

NPC:/talk I admit that you bring talents to my research that I very much need and am not sure where else to source at the moment, but don't let my guilt trip influence your decision. You've already done more than I could have expected.

Actions:

Stage summary:

Target Sardin and accept to continue helping him by using /nod in chat.