A Good-for-Nothing Human Emperor from the Start, Summoning Myriad Mythical Immortals and Gods

He had transmigrated into this high-martial-arts world of the Nine Provinces fifteen years ago.

Over those fifteen years, he had grown from a naive ten-year-old boy into the twenty-five-year-old man he was now. He had also spent all fifteen years on this dragon throne as a puppet in every sense of the word.

Xia Chen raised his eyes. Before him hovered a translucent blue System interface that only he could see. Its progress bar glared at him, frozen at [99%].