Re: 1. White Plume Mountain
Shrugging along the way, you continue on. (area 10)
Ahead is what appears to be a water-covered room, with steps rising out of the muck on the far side. The only shallow spaces are those that run mostly around the perimeter of the room, where the water is only 1 foot deep. There's no telling how deep the pool is, as sea weed tops the center of it, concentrated in two 10' clumps. As you look, you get the strangest sensation.
Beck and Valenestria make a DC 11 Wisdom saving throw or be magically charmed to dive underwater and instead of holding your breath underwater, you try to breathe normally and immediately drown in 2 rounds unless the others help you.
ROUND1