Nine Half-Immortal Sword Tools, with a market price exceeding five thousand Half-Immortal grade Spirit Stones each, were crafted through Han Yi's efforts over more than a decade.
The Void Sword World was formed based on these nine Sword Tools and the corresponding nine sets of Sword Secrets.
In other words,
Once he self-destructed the Nine Swords, the ability to use the Void Sword World would no longer be available, unless he once again found nine Half-Immortal Sword Tools and spent a long period on reassembling the Void Sword World.
Yet, faced with the True Immortal's killing formation, Han Yi didn't hesitate for a moment before deciding to self-detonate the Void Sword World.
After all, compared to survival, nine Half-Immortal Sword Tools and decades of time were truly insignificant.
Furthermore,
