Bleach: Watch Closely, This Is How You Use a Zanpakutō - Chapter 166: Sisters

220 years ago, in the legendary Dragon Demon War, Hero Azell ended the war by killing the evil Dragon Demon race’s King Atein. He was able to save the population, but as a consequence, he was cursed. While he was dying, the high magician suggested a gamble that might save his life.

Kai of the Sorcerer’s Tower is one of the last mages left, barely surviving in a world ruled by creatures of the dark — where the era of mages ended, and most of the lands got contaminated with dead mana. To save his world and fulfil his master’s last wish, he put himself through a forbidden ritual, risking his soul being ripped into pieces to make his way into the past. In an era with abundant mana — an era yet to enter the Golden Era of Magic. Things go wrong, of course, as they always do, and he finds himself thousands of years before the world fell to mana contamination — in the body of a young lord, Arzan. All is not well, though, as the young lord was murdered by someone right at the cusp of a beast wave threatening the territory, while larger threats loom on the horizon. There was a lot to do for Kai to regain his former strength in this time of primitive technology, but then again, he might just be able to change that.

As a Rogue Immortal, Tang Qing felt that the pressure on him was very big because you will never know when the next Heavenly Tribulation will descend upon you.

Also, you will never know just how many Heavenly Tribulations you would have to overcome to finally come to the end of the Heavenly Tribulation.

Just right after overcoming the Ninth Layer Heavenly Tribulation, Tang Qing’s body got extremely damaged by the perverted Heavenly Tribulation.

After climbing out of the ruins and being met with an unfathomable encounter, he became the dao companion of a bunch of heavenly women……

- Description from Novelupdates

The heavens and earth are furnaces, every living things are charcoal, and the Yin and Yang are fuel. The battle for destiny, fate, and luck between the Serpent and Sacred Saint Dragon arises. When all is said and done, will the Serpent emerge victorious or will the Sacred Saint Dragon rise up above all sentient beings?