Outside North Pole Immortal City, Han Yi did not use the Wanxing Daotai to hide his form, but he did slightly restrain his aura. Ordinary Golden Immortals would find it difficult to detect him, yet inside the Immortal City, the Fourth-stage Void Demon that he was observing managed to discover Han Yi's scrutiny.
This discovery made Han Yi's heart sink even further, realizing the terrifying nature of the Void Demons.
In the span of a finger snap, a glimmer of Sword Light burst forth, racing toward the ground below. The face of the Fourth-stage Void Demon changed drastically as a pitch-black Demon Energy erupted from its body, with a streak of blood shooting out from between its eyebrows. It was clear that the demon had sensed an attack by a powerful enemy and was attempting to activate a secret technique to escape.