No Prep Module: Duergars And Dragons (Patreon)

https://www.kassoon.com/dnd/adventure/no-prep-module-duergars-and-dragons/ 

Amidst the relentless storm's icy embrace, an ancient dragon's fate intertwines with a daring quest to thwart a duergar's sinister ambitions.

https://www.kassoon.com/dnd/adventure/no-prep-module-duergars-and-dragons/