This isn't the Taishu's Supreme Demon Altar, but a Star Heaven Sword Tomb!
Good heavens, it really is the true inheritance of the Beichen...
Zheng Zetian, having read the Ruyi Sword Sutra, naturally knows the sword path of the Beichen Sect. It is necessary to borrow the sword power of star heaven; the stronger the starlight, the greater the sword power. Plus, there are always stars in the sky, so you can always borrow some power to use. Therefore, no matter how much the heavenly path changes, Beichen's sword path is not bound to disappear.
Incidentally, the Sword Sovereign that night could even borrow the power of the illusory moon, which nowadays is simply an invincible sword path. It is clear that Beichen Sect has a new way of Tao.
