Omg i can talk abt this all day. So reality shifting is moving your concience into another stae of mind. Personally, I've been trying to shift to hogwarts. Once your mind and body are deeply relaxed, you would enter the meditative state. Reality shifting is based around this idea, but instead of letting it happen freely, the most precise details of your experience are planned by you! It's like incorporating a daydream into your subconscious. If you have any more questions I am more than glad to anwser them.
Reality shifting basically needs your consciousness from where you are standing, you need a clear mind to shift realities though. The "clones" would be the people that are in the reality that you shifted in. You can't really explain everything but I tried my best to clear it up. I hope this helps you. :D
Pope Julius II wanted Michelangelo to apply his artistic genius there. Michelangelo initially refused because he wanted to devote his time to sculpture instead of painting.