The Genie and the Engineer 3: Ravages of War

Read The Genie and the Engineer 3: Ravages of War Storyline:

First mission: Take Capie and their first Scottie son Daneel, fabricate and launch a spacecraft to the planet Mars. Avoid all wizards on Earth while doing so.
Check.
Now with the “easy” part over, they had the second mission to accomplish. The challenge? Survive on a frozen arid world, build an army of Scotties armed with powerful talismans, then return to free the peoples of Earth. Of course in the process, they will have to fight and defeat all the governments, armies, and evil wizards with their 40,000+ Oni warrior/slaves.
This should be a cake walk, right?
Paul has this feeling that he might, just might, have gotten in a little over his head.