The Heretic Mage of the Magic Empire

Advanced beings, these words are only for you. Coming here you enter the final and only tomb of the Creator. Enter this magical world - our paradise. … As the apprentice of the Witch King, the time traveler Orem has mediocre qualifications and cautious personality. He just wants to survive stably in this magical world. Until while exploring the ruins, the chief apprentice Orma died unexpectedly, allowing him to accidentally obtain the secret treasure in the deepest part of the ruins-the original rune. This ancient thing is the source of "rune magic" - a heretical magic that has been proven to be faster and safer to perform and is especially good at creating legends. However, it was banned by the country and its founder was also tortured and killed. Orem guarded this secret with trepidation until the Witch-King appointed his most humble apprentice as the new chief.