Also… would you have your players approaching from the left side or the right side?
There are much meaner variations of this.
Make the right area split into two, such that as it fills with water, the players are forced into the section that DOESN’T have the ladder.
The left side is an effective delta P based trap
https://www.youtube.com/watch?v=AEtbFm_CjE0
TPK incoming
Would they even be able to unlatch it with all that pressure?
There must be a way to make it work mechanically (even if it’s a lever on a pulley on a screw on a wedge).
And if not, there must be a way to make it work magically.
An iris would work, or a gate that lifts up
Left is difficult because you have to hold your breath while picking the lock, right is difficult to get to the ledge… tough call
LOL, that’s just mean!
Is it? No wonder my players always search everything thoroughly.
![When they open the door... [dungeon, trap, side view]](https://ttrpg.network/pictrs/image/42d7283b-48e0-4e07-bb04-872988f3475b.jpeg){kind=link}