[thejeff]

4) You cannot enter or leave. I'm not sure about what happens the turn it's cast. Movement happens after casting, so it should block, but it may only stop the orders from being issued.

It's not an absurd situation. Just a frustrating and difficult one.

Teleport/Gateway/Astral Travel get you out. I assume Stygian Paths does too. You can Cloud Trapeze in.