((Forget about the Behemoths. I'm more worried about Aurel due to his damage output, which has been heightened now that he's a shadow. And believe me, I best know how high that is.
Also, this is kinda a stupid question, but can't Nadarr FLY outta the pit? Like, since before the start of the encounter?))
((Try landing on soft soil when you can barely fly 5' off of the ground. Also, he fumbled the first shot, and mud+wings=no fly))
Open the Bags of Holding and do whatever possible to fill it with the water.
You take a full action to pull out your bag of holding and open it. (?) You drain enough of the water with one bag to get yourself some air, and get you out enough that you're no longer immobilized.
You then feel something tugging on your back collar and the water level drops drastically. You gasp for air after draning it enough and you notice the claws digging into the sides of the wet walls of the hole. You hear the high pitched hissing of your faithful Kruthik that followed you underground. You're fairly certain it hates the shadow creatures by the fact its hissing at the behemoths. She ends her turn after she stands in between you and the closest behemoth.
Shadow Behemoth2 moves around the tree and towards Weston, destroying the kitchen tent! You hear the sound of wood being crushed under the weight of the abomination as he steps towards you! It gorges at Weston! He hits with his mighty claw, knocking Weston prone and dealing (5) damage! He swings again! He hits a second time, pinning you to the ground and dealing another (7) damage! Until Weston breaks from his restraints, he takes ongoing (5) shadow damage!
Symon begins his turn! You are knocked prone!