Quote from Stivali >>

Jahn would accept the two keys, knowing this can probably help unlock the locked door down the hall.

"My name is Jahn."   They'd look around and acknowledge Doter is not here, but shrugs it off.  "Were here to find a cure to a dastardly disease that afflicted a family.  I think it would be best to accompany us and travel back to civilization.  Strength in numbers."   Jahn would walk outside and outside S18.   They'd wait for the others to regroup on them before opening/unlocking the door.

Sable agrees with a simple, "Nn." Then points at herself and says,  "Sable."

Since Jahn mentioned that they were looking for antidotes, Sable helped look around the room. While she wouldn't know an antidote if she saw one, she could point out vials and flasks that look like they might be important. After all, the wight had been working on something in here...

Perception 25

Seeing the skeletal figure clearly, Sable says, "Monster." and draws her rapier, pointing it at Erzer.

Quote from Stivali >>

Before doing this, Jahn would also search the room for any antidotes.

 You do not find any antidotes, but you do find 8 vials of Frigid Woe, and 7 sets of alchemists’ supplies. 

Jahn is sure not to touch the frigid woe.  "Don't touch these..."  They'd announce to Sable before seeing her react to Erzer, they'd calmly let her know. "It's with us.  Not currently a threat."

"Not Monster? Nn." 

Sable put away her rapier. She had plenty of experience with things that appeared to be monsters but were actually allies. Starting with the one that was the reason her home hamlet was destroyed.

"Don't worry, he getss that reaction everywhere we go." Ulysse looks around, mostly for Doter, his friend who had originally brought him on journey but seems to wonder off from time to time. "You wouldn't have happened to have sseen a fellow with a big shell on his back did you?"

Sable shakes her head no as she says, "Nn."

Would you like to attempt to enter area 18 now?

(Yep yep!)

The door is unlocked. 

A cold wind howls through the collapsed east wall of this huge chamber, whose far side is completely submerged under frigid seawater. A dense bed of kelp grows up from the submerged floor, obscuring any sight of what lies below. Broken glass and the remains of shattered tables cover the floor in the dry section of the room.

Jahn would search the room for any signs of threats or anything significant to the mission. 

Investigation:  11

Sable and Ulysse, with your passive perceptions, you see that amongst the kelp in the 5-foot-deep water there are two, no three, no four dark shapes, and after looking at them for a few moments you notice that they look like crabs. Crabs that have a 5-foot leg span. 

Also, everyone except Erzer, you see a stone chest built into the floor and submerged in the water against the back wall.

Jahn would see the chest and ponder.  They'd start to approach the edge of the water unless stopped.  "There looks to be something against the wall."

"Cold water bad," comments Sable.

(How submerged is the chest? Like how much water is over it?)

Quote from Engineered_Beard >>

(How submerged is the chest? Like how much water is over it?)

 The chest is 2 feet tall, and the water is about 4 to 5 feet deep where it is. 

“OH GREAT MONKEY BUTT, TELL ME IF THERE IS MAGIC IN THE CHEST!”

boil will cast detect magic!

You detect a faint aura of abjuration magic from the chest, as well as an aura of transmutation from within the chest, and a seperate instance of abjuration from within the chest, this time much stronger. You also sense four seperate auras of transmutation coming from within the kelp. 

Erzer enters the room, his skeletal hand wreathed in sickly green light, ready for anything. He investigates the room for possible threats, but gets distracted by the water. (Investigation: 6.)