The Nine Fire Flame Dragon was essentially a creature created by Cui Heng's spell.
Although it already had a complete spirituality, the Nine Fire Flame Dragon was still an extension of Cui Heng's perception.
Therefore, Cui Heng had actually sensed the entire process of Huo Si fighting Ye Yun.
Including Ye Yun's self-destruction and his remaining arm.
Through these two points, Cui Heng roughly understood Ye Yun's situation.
It was roughly equivalent to the Mid-stage Golden Core realm. Its strength was slightly weaker, which was the so-called Taiyi Mystic Deity realm.
However, his lifespan was extremely abnormal.
Judging from that arm, Ye Yun had lived for at least 7,000 years.
This had far exceeded the limit of lifespan that a Fourth Realm Immortal cultivator could reach.