After understanding the immortal seed, Fang Jinyu had a more accurate estimate of his strength. He also knew that a Core Formation stage cultivator with no immortal seed would be no different from the Foundation Establishment stage cultivators when fighting him.
Fang Jinyu could severely injure the other party with a single glance of his divine sense.
Speaking of which, Fang Jinyu accidentally comprehended it from Qing Fu! On the way back to the Tianling Sect from the Utopia Immortal City in the Nine Desolations, she had knocked on him on the superior-tier stargazing flying ship. He couldn't forget the stinging sensation of his divine sense for a long time.
Hence, one day, Fang Jinyu comprehended such a move.
Initially, Fang Jinyu wanted to strengthen his divine sense and get Qing Fu to knock him again to see whether he could comprehend a stronger divine sense-killing move.
After all, Qing Fu's divine sense attack was really painful!