Chapter 159 - Elemental circle
After around 5 hours of this going, Kyle understood that he has already gotten the most out of the situation, and Ember was starting to tire. The constant light, as well as a need to overpower the shadows that were just as dangerous to anything with a soul, really made the Ember Soul tire out.
This meant that Kyle couldn't continue forever. Kyle was forced at this point to pull the Ember back and incredibly fast, and after an unknown force started pulling from the depths of the basin, the Ember Spirit flew out and went into Kyle dantian.
It seemed that Kyle was right in time with that because some incredible force nearly grabbed hold of the Ember and took it in.
The Ember floated into the space of the emblem inside the dantian and happily rested there.
Kyle felt that the Ember was sleeping with no way to interact or even to cause it to move.