This is self explanatory. I used R2 to inpect one and even on the inside it looks like it was intented to be usable.
Just needs a portal at the "back door" that teleports you to the cooresponding opening directly above it (and vice versa).
When on top, only allow distance effects with those outside (or melee with x reach for really big creatures).
Just needs a portal at the "back door" that teleports you to the cooresponding opening directly above it (and vice versa).
When on top, only allow distance effects with those outside (or melee with x reach for really big creatures).