Changes

How to find the secret passage ?

There's dust on the ground, but not nearly enough.

'''Action : If they try to study the plans of the floor''' there's no chance to find it. Because no precise plan exist.

'''Action : Tracker''' can work.

'''Action : Anything that makes sense is ok'''

'''Action : Knock on every walls until one of them sound empty.''' is ok.

'''Action : Pour water as much as they can and see where it exfiltartes''' is ok too.