Runes could be said to be a special cultivation technique in the world of cultivation. It could even be said to be a different way of historical inheritance and recording. In the worlds that Zhao Hai had been to, from the lowest level of magic to the blood sea realm, each world had its own runes. These runes seemed to have no connection on the surface. They all had their own system. However, after Zhao Hai's comparison and analysis of the runes of various planes, he finally discovered that these runes actually had a unified vein that could be found. Therefore, Zhao Hai carried out a unified analysis and arrangement of these runes. In the end, he concluded that this entire rune system, from low to high, was the most complete and most authoritative rune literature teaching material in the blood slaughter sect.
