I'd recommend 'Solo Leveling' if you're looking for something similar. Both have powerful protagonists and exciting battles.
One manhwa similar to Magic Emperor could be 'The God of High School'. It shares elements of fantasy and intense action.
Chapter 119, "A Wrong Decision", is the clearest early answer because it turns Keith's situation into a concrete plot event. Early on, The cavern trembled as Keith faced off against the towering.... By the end, Meanwhile, the other beasts attacked from all sides, some using....
Chapter 77, "We Have Guests II", is the clearest early answer because it turns Dean Godsthorn's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Come on in." Dean Godsthorn commanded and as if the doors had minds... and follows through with The pressure in the room spiked and the walls splintered..
Chapter 77, "We Have Guests II", is the clearest early answer because it turns Dean Dethrein's situation into a concrete plot event. The chapter gives readers a real answer by opening on Come on in." Dean Godsthorn commanded and as if the doors had minds... and ending on The two men locked gazes, the air between them vibrating with....
Chapter 199, "Dealing With Lukas, The Kid", is the clearest early answer because it turns Arielle's situation into a concrete plot event. The setup is The remaining bandits, seeing their leader defeated, dropped their..., but the pressure keeps building through As the silence returned, Damien glanced at the boy, who stood frozen.... Once the chapter lands on If I go back to them… they'll kill me for sure." Arielle sighed, the..., the chapter closes with Expecting your replies.
Chapter 137, "A Little Thief", is the clearest early answer because it turns Damien's situation into a concrete plot event. The setup is Over the bustling streets, the rising sun shone down but there was..., but the pressure keeps building through Damien walked with measured steps, his sharp silver eyes scanning his....
Chapter 347, "Training And Touring", is the clearest early answer because it turns Lyone's situation into a concrete plot event. The setup is The city of Greshan never truly slept., but the pressure keeps building through Even under the dark velvet sky, its streets hummed with life—muted.... Once the chapter lands on You mad bastard!" This time, the boy didn't get up immediately., the chapter closes with And this time—he remembered who he was training.
Chapter 297, "Meeting Lyone", is the clearest early answer because it turns Damien's situation into a concrete plot event. The setup is The air in Velthorne was thick with panic., but the pressure keeps building through Guards stormed through the cobblestone streets in frantic clusters,....
Chapter 399, "Another Test For Lyone", is the clearest early answer because it turns Lyone's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Lyone nodded, though his jaw was tight. and follows through with Despite the burns, the crimson veins were still faintly visible,....
Chapter 141, "Demon Infestation Mission II", is the clearest early answer because it turns Demon Infestation Mission's situation into a concrete plot event. The setup is Damien moved into the shadowy recess of an alley, checking for any..., but the pressure keeps building through Summon Aquila." Damien muttered lazily as he awaited the expected....
Chapter 296, "Mission Was A Success", is the clearest early answer because it turns Kael's situation into a concrete plot event. The setup is The music soared in sweet rhythm., but the pressure keeps building through In the grand celebration hall of Velthorne Castle, laughter danced....