Spirit Theory

According to Ri Gan, Spirit Theory explains how People of the Land dies while Adventurers and demihumans respawn. What all of them have in common is spirits which consist of soul, the mind's power, and essence, the body' strength. The stronger the former, the higher the magical power and MP. The stronger the latter, the higher the Ki and HP.

The psyche, personality, ambition, character, and other information are stored in both soul and essence. When essence is diminished, it will start dispersing. This process is called failing essence. How long it takes depends on how strong the essence is. Low-level essence may disperse in a matter of minute while high-level essence may take up to a half a day.

When a healer cast a resurrection spell, it will gather the dispersed essence around the area, and reconstruct and send it back to the body. If Ki is insufficient during the reconstruction process, the healer will top off with their own Ki. The information needed for reconstruction is taken from the body and calculated through reverse engineering. If there is any mistake in calculation, it will result in the body losing EXP, which is called data corruption.