I'm not sure I remember the name of the dungeon correctly as I don't have the rule book with me at the moment. But it's the one with two rune locked doors and 4 question marks in two rooms, and the only way for the heroes to open the rune locked doors is to stand on the question marks at the same time.
There's a Master Naga boss in the second room, and since he is a named monster according to FAQ he can open and close the runelocked doors.
The wording on the dungeon card says (going by memory here) "...standing on the quest markers opens the door..." it does not say anything about unlocking it, or giving the rune key to heroes. So by this logic I as OL figured I could park the leader next to the first door and just keep closing it forcing heroes to go back and stand on the quest markers to open it.
Would this be the correct way to play the dungeon, or would you allow your heroes to open the rune locked door using normal movement action after it's been opened via the question markers once before ?