Asura (manhwa)

Read Manhwa Asura (manhwa):

The absolute king who initially united the continent despatched a commander, but he never came back to find the secret of immortality. No matter where in the world he had to look, the emperor was confident he would discover the secret. However, he never returned by the time the emperor passed away and the empire collapsed, leaving only endless theories in his wake. He eventually faded from people’s recollections over time. And after much time had gone…