First off, it's not exactly 'chapter one' - the manhwa adaptation usually compresses the opening arc. The initial setup is classic regression revenge but with a clever spin. A once mighty archmage fails to stop a cataclysm and is sent back in time to his younger, weak body. The immediate conflict is internal; he's flooded with memories of his past incompetence and future power, which is a great hook. We see him trying to reconcile the two states of being. There's a brief but effective flashback to his final, desperate spell that triggered the regression.
What stood out to me was the pacing. Instead of an immediate power trip, the chapter lingers on his disorientation and the sheer weight of knowing everything that will go wrong. It ends on a quiet note of grim determination, not a flashy fight. He's just sitting in his old, shabby room, staring at his hands, realizing the monumental task ahead. The art really sells the shift from despair to a cold, calculating focus in his eyes.