Let's Play Eye of the Beholder 15: Deeper into the Flames
If you want some music to play on loop during the drow level, I suggest this as a good starting point:
https://www.youtube.com/watch?v=Luh3VJUEwuk
There are worse enemies in the depths beneath Waterdeep then drow, even if it's hard to consider that after the floor we've spent quite a while on. They may not be able to paraylse the party with their melee attacks but there's far nastier abilities out there that we'll discover the deeper we go.
For now, it's time to leave this level once and for all and see what lies beneath the party's feet. Each floor down brings us closer to the beholder behind the curtain, manipulating events in it's plan to conquer Waterdeep. We're going to need that wand to be victorious but for that we'll need to persuade the dwarves to give it to us first.