The Qingqiu Demon King passed peacefully.
...
The object Chu Liang chose to kill Cai Yi and the Demon Seed was the broken bone shard that had fallen from Yan Renjie after his death.
The shard was necessary because the Demon Seed was a terrifying being that not even the frontal assault of the Shu Mountain Divine Boat could kill. Even if the divine weapons in his possession were powerful, they could not surpass the Divine Boat. Even the Demon-slaying Sword, with its bonus against evil spirits, would not achieve this feat.
If there was anything that could achieve this effect, it was only this bone shard. It was the physical remnant left by the fusion of the Demon Suppression Tower and the Demon God Origin inside Yan Renjie, and the reason this abyss repelled Evil Demons was due to its spiritual power influence, which not even an Eighth Realm Evil Demon could break through.
In other words, its spiritual power repelled evil spirits and was a force above the Eighth Realm.
