Hello! Looks good to me Korbanjaro. It's much more elaborate than I had imagined but I like the detail you've added. To answer your question, I didn't really want to place restrictions on powers. Just make sure you're not God modding. Also, one suggestion was to base your power on your characters personality and strengths.

Also, I would like to ask where in the story the characters would like to begin their narrative. There are many options from when they were recruited, after their procedure, during training...etc. I think that personally I like the idea of starting after the procedure and putting recruitment details in the history. Thanks, and let me know.