He tested the ability of the Immortal Body.
"Sacrificial Spirit Forbidden Escape!"
This was a secret technique of the Golden Technique Sect, a Saint Martial Art that involved sacrificing one's soul in exchange for teleportation and spatial displacement along the Holy Path.
Usually, this was an escape technique used by desperate spiritual cultivators. The burst of power in that instant was unstoppable within the Demi-Saint Stage.
However, it resulted in immediate death after use.
It was an extremely foolish Saint Stage martial art, but it was mysterious enough to be included in the Golden Technique Sect's collection.
It was understandable that it was listed as a secret technique.
The reason the Immortal Body was revered as one of the Five Extreme Physiques was not only because of its passive ability to avoid death, but also because it meant that the owner could spend their lives doing many things that ordinary people would never dare to do.