Originally Posted by
Thurbane
Looking at Imprisoning Cells (the entry after The Hospice in MotP), got me thinking.
If I wanted to dispose of an "unkilliable" enemy, by physically cramming them into a box or cell, then set it adrift on a plane where it is going to take a long time, if ever, to be found - which plane would be best? Are there any better than the Positive Energy plane for this?
Assume the creature has no means to plane shift or escape its cell without external interference.