When Su Li returned to her dwelling, as she expected, Jin Ying didn’t visit her again. Su Li closed the wooden door, and sat back on the bed, taking out the lowest-grade spiritual stone. She didn’t prepare anything, but a keen silver light soon lit up on her fingertips, and she drew a line on the spiritual stone.

Pit-a-pat!

The square stone split evenly into two triangular stones. If they were put to a scale, it would be found that the difference in weight ...