Yang Xiao speculated that during the battle with the Sword Lord, the Second Demon Uncle fought until he was completely exhausted. He was not in good condition, and as a result of overusing the Magic Artifact, he was backfired by it on the spot.
Generally, being backfired by a Magic Artifact would reduce one to a mindless killing machine, but the Second Demon Uncle was clearly not in such a state.
He was neither a mindless being, nor a human; he was a resentful spirit!
He was possessed by the resentful spirit from the Magic Artifact!
And the creature trapped in the Blood Fog World, roaring to reclaim his body, was the real Second Demon Uncle!
After the resentful spirit commandeered this body, the power it unleashed was far beyond what the Second Demon Uncle could muster. It repelled the Sword Lord or possibly escaped; in any case, it survived and inherited this body as the Second Demon Uncle.
