So, seeing as this board was immensely helpful last time, I figured I may as well test the waters on the other session I wasn't decided on. Just as the last area was run by the psionics version of a conjurer, the next is run by essentially a master transmuted. Now, originally I was planning a "damsel you rescued was the polymorphed psionics all along" approach but I think I'm overdoing the traitor approach.
So, I'm looking for other approaches. Assuming near limitless amounts of materials and creatures, but unable to leave your facility, what do you think a world run by a master transmuted would look like after a few thousand years of isolation?
Well if it happened to me, I would probably create a whole new world full of wonders and mystical beasts. Where magic is commonplace and elfs squabble with dwarfs over facial hair.
With that said...
How can they be sure they aren't already in the transmuter's world? A few thousand years is plenty enough time to become a god of your own domain. You could pull a real meta session, with their characters coming to the realization that they're only part of someone's imagination.
I would probably have them being stuck in this world of his from the beginning of the session, and it is only when they realize this that they can escape.
Maybe they are returned to the "start" each time they manage to defeat the master transmuter in his lair, with minor changes after every restart (to help their train of thoughts). When they manage to escape by some technique (suicide is an option!), they wake up in an empty room, next to a mumified corpse hanging from a rope... The master transmuter ended his life ages ago when he realized nothing he could create in this isolated space would ever have any meaning since it was just part of his imagination. Tired of living, tired of experiencing, he longed for the peace only the dead know.
Edit: assuming the master transmuter is a he.