tubes

[Loch Belthadd]

I hadn't heard about planescape before. The guards and inevitables guard it because it breaks the natural laws of the multiverse and they haven't found a way to destroy it.

[Ninja D!]

Well, then...

Why would the inevitables work with the mortals?  Why wouldn't it be just one or they other?  

If these tubes go from world to world, are the guardians the same at every opening?  Are they the same because those guards have, themselves, broken the rules and travelled there?  Or has the same organization developed on its own in each world?  (Most would call that a failing in logic, I would call it something very interesting to explore.  It could indicated that there is one over power that rules over all these worlds.)

Lastly, look into Planescape.  It's pretty cool and there is probably a lot of stuff you could take from it to further this idea.  Not sold on it yet?  How about this : Giant Space Hamsters.