Back when the Mortal Renegade exterminated all of the peoples of the starry sky, the resulting vengeful souls were sullied by his aura, and became these devilish specters, which had once been the terror of anyone who faced them in battle.
Because they were already dead, they didn’t fear being cut down in battle, and actually could not be exterminated without the use of spectacularly powerful divine abilities or magical techniques. Most other methods were useless against them.
Only a few groups out in the starry sky had possessed divine abilities that could target soul bodies. Those were people that the Mortal Renegade had dealt with personally. For the most part, his grand army of devilish specters was his most deadly and terrifying weapon.
Back when the three Eternal Sons...