[He stated that a crucial material for the artifact refining process was missing, the Space Spirit Stone!]
[If this stone could be found, his refining this time would surely achieve a breakthrough, potentially creating a flying boat of almost Acquired Treasure level!]
[The current flying boat could only conduct short-distance travel between nearby small worlds... but a half-step Acquired Treasure could even cross over a dozen worlds!]
[Seeing the regret on the Qi Refinement Elder's face, you silently noted all this in your heart...]
In the real world, Su Xing sighed as he saw this.
"What a pity... Supreme Immortal Treasure to half-step Acquired Treasure, that's a qualitative leap!"
Su Xing shook his head slightly.
Above Spiritual Artifacts were Immortal Artifacts, also known as Immortal Treasures.
These powerful magical treasures were eligible to be wielded only by Immortals.