Those who are utterly vicious and devoid of humanity are called "Renxiao"—man-ghouls!

Those who are worldly-wise and deeply versed in human nature are called "Renjing"—man-spirits!

Those who are fierce as demons and kill without blinking are called "Rentu"—man-butchers!

Then, what about those whose actions are shrouded in mystery, whose intelligence is as cunning as a demon? They are called...