What route of power did Stencil embark on?
With powers similar to Zaira, she was posed with some options and the challenges associated with that. In order to avoid strengthening Zaira, Stencil avoided the route of Systems altogether.
But her powers were more or less geared in the same domain—Mental Energy. Therefore, she arrived at a conclusion—concept.
Just as how the System World absorbed the thoughts of people and condensed concepts out of those thoughts and birthed Systems, Stencil did the same.
But, instead of a fixed concept that Systems were based upon, hers were fluid concepts.
These concepts were primarily based upon actions and consequences than a state of being. For example, Muscle Lantern was based on the thoughts people generated while bodybuilding, undergoing surgery, and rehabilitation.
Injury was a state of being. But rehabilitation was an action. This was their primary difference.