A Faerie's Meridians

[Death Acupoint]. Ryu had no choice but to thank Ailsa and Elena for this chance because had it not been for them, awakening this ability so quickly would have been impossible. Though it might have been yet another auxiliary ability and not nearly as direct as [Heaven and Earth Gate], [Death Acupoint] was perfect for what Ryu needed now. 

The human body or any living body, for that matter, was an odd thing. Often times, the parameters that controlled it were far too variable for one to understand. 

To comprehend what [Death Acupoint] could do, an illustration of a mortal could be used.