The seemingly simple flying sword in fact involved many sophisticated theories in string theory, membrane theory, and even quantum physics. Even the Star Glory Federation might not be able to produce it.
Logically, it was impossible for a civilization whose civilization was still in the medieval phase to build such a weapon.
However, according to the stories told by the Immortal Cultivator Su Changfa and the experience that he learned from Ou Yezi's memory pieces, he found a very plausible explanation for the uncanny phenomenon.
The explanation was very simple. The magical equipment that surpassed the era it was in often boasted units or rune arrays left by the Pangu Clan or the Nuwa Clan as the core parts.
Their offspring were merely adding new ancillary units to the magical equipment pieces of the primeval era.
It was like a primitive barbarian in the stone age who picked up a military dagger produced through modern technologies.
