Any idea if Waterdeep: Dragon Heist takes place in 1492 DR or 1491 DR?

Is there any interesting wildlife that makes its home in Waterdeep?

How did the Gosts spliter off from the Ruldegosts in Waterdeep?

What is the official and proper style of address for Waterdeep nobles?

One of my players is a Cleric of Mask who pretends to be a cleric of Waukeen…

Could you provide some insight on on ancient Waterdeep