When all the living creatures forced to go undergroundShadowfiend struggle to find another living soul to collecthe starts to go weaker and weaker due to famished in soulsone day, he stumble upon a magical crystal that grants power.within it, contains the soul of all the creatures that diesit was hell itself. Materialize into a crystal form.finding a host that can serve it as a soul collector.the power it contain was so much for shadowfiend to handleit melts his body rendered into a lavabut at the same time the crystal gives him the ability to heal himself at a rapid timeit brings him pain and power simultaneouslybut for a demon who only cares about powerit was only a small cost to bare.