These three illusions were naturally conjured by Shi Feiyang, who had discerned the intentions of the East Sea Three Immortals, urgently devised this plan, and used the Secret Demon Great Technique to create the Heavenly Demon Illusion.
The East Sea Three Immortals sought to divert disaster eastward, drawing the Taiyin Hunyuan Ancestor in to make him fight with himself.
Shi Feiyang thus diverted the disaster southward instead, leading the Taiyin Hunyuan Ancestor to attack the Divine Nun You Tan.
The Three Immortals Illusion he created couldn't project the Invisible Sword Energy of the Taicing Mysterious Sect, only producing some audio and visual effects, primarily relying on vocal tricks to lure the enemy.
But this was already sufficient; Emperor Chi You, having been captured, slain, dismembered, and suppressed by the Yellow Emperor, had accrued rage for thousands of years. Upon encountering the descendants of Yan and Huang, he naturally went on a killing spree.
