The replicants are simulacra of Rudolf Hess, Martin Bormann, and Albert Speer.
The 'party' would be comprised of these replicants, mutated plants local to Gamymede, and pure strain human partisans.
An initial objective would be to infiltrate the Reich leadership to a point where the actual Hess, Bormann, and/or Speer could be quietly assassinated and replaced.
Motivations of the Gamymedeans<?>
I filled my palace with deadly traps so trap admirers will come and visit me
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