The Ring of Light

The Ring of Light is a ring that came into Nikolai's possession on his journey south from Kislev to Karak Azgal.
Nikolai used the ring's power during a tavern brawl in the Inn Way Too Deep. Reinhardt Bormann, who witnessed the fight, described the ring to produce a blinding light. Nikolai's use of the ring brought it to the attention of the Kislevites of Deadgate, including the notorious criminal, Dmitri. Dmitri sought to take the ring from Nikolai for his own nefarious purposes. Thus, the ring led to Nikolai's disappearance.
Nikolai found the ring on his journey south to Karak Azgal. He found it after killing some Goblins in Blackfire Pass. The Ring is actually a Ring of Dazh, the Kislevian God of Light and the Sun. When used it channels that god's power and produces a blinding flash that dazzles and blinds enemies.