Dragon Emperor Returns

Kain was abandoned by the royal family for having a worthless bloodline, secretly raised by three priests. After training, he infiltrated the Royal Dragon Knight Academy with a token to uncover his origins. On the way, he slew a three-headed dragon with one strike, stunning the royal dragon general. At the academy, his mother recognized him by his birthmark, but his father seized the token, branded him a thief, and sent him to the execution platform. As the dragon emperor raised his staff and the abyss churned, the dragon general suddenly recognized the platinum sword mark on Kain's blade matching the dragon's wound, and shouted stop. Dead silence fell. They didn't know Kain had awakened the Pureblood Dragon lineage. Platinum dragon flame soared. The family who abandoned him knelt in regret. Kain rose to the top, becoming the one worshipped by the entire empire.