Extra And MC - Chapter 89 - 85 - Novier

Yuki, a high school junior, dies heroically saving a stranger and is reincarnated in a fantasy world, where he discovers an extraordinary and unrivaled power.

Monster Fusion: Rise of the Vice Sect LeaderRay Darkheart was cursed forever unable to cultivate, even after reincarnation. No technique, no bloodline, no divine intervention could change his fate. His body rejected all forms of cultivation, leaving him powerless in a world where strength ruled.But fate was not so absolute.One day, he awakened the Monster Fusion System a power unlike any other. By fusing two monsters of the same rank, he could create something far stronger, evolving them beyond their natural limits. Each fusion carried forward enhanced traits, bloodlines, and abilities, forming creatures that defied logic itself.Yet power came at a price.To advance, to unlock the system’s hidden functions, he needed spiritual stones countless, unending spiritual stones. Every ability, every upgrade, every path forward demanded a fortune. Alchemy, formations, talismans, swordsmanship nothing was beyond his reach, as long as he could afford it.Thus, Ray chose the only path left to him.If the world would not grant him strength, he would take it for himself. As the Vice Sect Leader, he would amass wealth, plunder resources, and rob cultivators blind not for greed, but for survival.A powerless man? No.A schemer, a thief, a legend in the making Ray Darkheart would rise.[sect building] [business empire] [disciple cultivation] [comedy] [alchemist] [formation master] [sword dao] [system] [monster fusion] [resource management] [plundering] [strategic growth] [power progression] [cultivation world]

Emperor Xianwu ninth reincarnation, only to break through the shackles, was besieged and killed by masters from all walks of life.

Fortunately, a ray of divine consciousness traveled across thousands of planes to the earth and entered the body of the dead young man, just to get rid of the anger in his heart and to regain that peerless peak!

- Description from MTL

The maniac who was crazy about all kinds of fields such as military and steampunk had been reincarnated.

However, his father was King Sejong the Great?

The mania-wise king and his crazy maniac son.

Along with the ministers, and countless humans who were getting exploited.

Even today, the night of Joseon was filled with the light of overtime.