Rebirth Cultivation of Thunder Fist

After the great war 20 years ago, the three strongest warriors had to fight thousands of Demon Lord’s army. At a time when the entire Martial Academies was preoccupied with war and fatigue, the Demon Lord Army wanted to rule the world. No one knows what happened to the battle of the 3 strongest warriors with the Demon Lord's army. However, everything became peaceful. Until, 20 years later, the world had fallen into chaos once again, the strong became king and greed appeared everywhere. The Demon Lord's army also wants to regain control of the world. A young man suddenly appeared, his name was Kaja. He wielded infinite power with great energy. He came and had one mission, defeating the Demon Lord. About the youth's past, everyone became curious about him.