The Isle Master Tie Chui himself is a Tier Two Top-grade Artifact Refiner, who at most can only craft top-grade spiritual artifacts.
Thus, the content Ji Yuan is currently browsing is actually what Tie Chui left behind shortly before his death. It seems he was already prepared to pass on this "Artifact Crafting Manual" to others... Beside the recorded content, he has left small, meticulous notes as annotations.
Like beside the "Spiritual Energy Cannon," there's a note.
"The Spiritual Energy Cannon is mostly used by cities on mountain edges and riverbanks to resist beast tides."
"I acquired the method of refining this by chance; once successfully crafted, its power is immense, capable of allowing those in Foundation Establishment to potentially kill a Gold Core cultivator."
