Monster closets

[mmmdule]

Add a wall type called monster closet.

It basically functions the same as the skull door, but it looks like a regular wall.

When the door is unlocked, or some other event occurs, all the walls marked monster closet will disappear.
The room hiding behind that wall is the monster closet which hold multiple monsters inside.

It could perhaps be a square made out of monster closet walls which would change the layout of the level and so on.