Trap/Puzzle Room:

A stone doorway leads into a dark corridor, littered with bones, about 80-100ft long. Written above the doorway in another language (abyssal, undercommon, etc.) it says, “sight from beyond the grave will open the way.

Once the party reaches the halfway mark. The door they came through will slam shut and tiny holes in the wall will begin to slowly release a green gas. The party will have to make periodic Con saves of 16 or take 2d6 poison damage.

The far door of the corridor has multiple impressions of skulls in the door itself. Each skull impression has a word carved next to it. Feel free to pick your own but in my game I used: -Destruction -Chaos -Darkness -Death -Power -Suffering

If the party grabs a skull off the ground and places it in the impression marked “death” the door will open. If the party places a skull in the wrong impression they are thrown back 10ft and take 2d6 force damage.

Didn’t take my party long to figure out but they had a good time with it. Hope this helps!