Yin Devil Execution aka Yin Demon Slash (阴魔斩)
It operated in a same manner as the Blood Spirit Drill. They both refined a portion of one’s base essence that was folded to contain an immense, unstoppable force that was consumed after a single use.
The cultivation of an individual affected how many times the base essence could be folded, signifying its strength, as well as the amount of time it would require to condense. According to legend, when it was condensed to the deepest folds, it could tear through space itself and leave only the void in its path.