The rule that Kane comprehended is to make a portion of his magic power unleash greater energy.
The current restriction on Kane creating higher-level mechanical constructs is, firstly, the issue of materials, and secondly, the issue of using more powerful energy.
And the material issue has already been solved.
After all, the technology Kane employs is not an energy core, but rather an energy circuit constructed from his own magic power, which essentially utilizes the nature of creating objects through his origin skills.
However, in the end, energy circuits still need a powerful energy core to power up large objects.
The circuit technology merely allows the mechanician to control more mechanical devices minutely, essentially using himself as the energy core.
The advantage of this is simply more freedom and spontaneity.
