The Main Character's Overpowered Old Grandpa

In the vast universe, billions, perhaps trillions of miles long, many, many things can happen. Across the vast swathes of planets and open space, and across the multiple aeons of time, very few things can cause a ripple throughout the universe. With the exception of one. This event did not just cause a ripple. This event shook the entire universe. It was when the most powerful expert in the entire universe became the first person to reach the Heavenly Immortal realm at only 100 years old. This legendary figure's name has been lost billions of years ago. But everyone just called him the Immortal Emperor. He was not just a genius. His talent exceeded anyone else in existence. But being a Heavenly Immortal was different from being a God, as a Heavenly Immortal would still die one day. ------ With the Immortal Emperor only having a hundred years left to live, he decides to explore the vast universe. In his exploration, he finds a young man. And the most surprising thing was - this young man had the same level of talent as he did in the past. ------ Read about the adventures of the duo in this novel, as the main character tries to get stronger, and his master desperately attempting to avoid death. Hope you enjoy!