Return of the 8th class Magician

Read Manhwa Return of the 8th class Magician:

I haven’t shed a tear for the United Empire or its ruler, Ragnar, in a long time. I desired to go back to my hometown and lead a quiet life in order to atone for my transgressions. But “you are a powerful eighth-class magician who can overthrow the empire and me at any time” “How could I have allowed such a monster to survive?” He pierced my heart with a blade that had time magic affixed to it after being betrayed on the brink of death by Ragnar, who was both my friend and my Emperor. “Putting everything back in its proper place is the redemption I seek.”