Shikkaku-mon no Saikyou Kenja ~Sekai Saikyou no Kenja ga Sarani Tsuyoku Naru Tame ni Tensei Shimashita~

Mathias, the most powerful sage of his age, has reached a bitter ceiling. Despite his unrivaled intellect and mastery over arcane arts, the very magical crest he was born with shackles his potential, placing an insurmountable limit on his strength. Unwilling to accept mediocrity, he makes the ultimate gambit: reincarnation. He is reborn into a new era, and to his elation, his first life grants him a crest perfectly optimized for magical combat—the very tool he had been denied. Certain that this new beginning will finally allow him to transcend all boundaries, he sets out to achieve the absolute peak of power. But the world that welcomes him is not what he expected. Ages have passed since his time, and magical knowledge has decayed into laughably poor standards. The techniques once considered elementary are now lost, and the very foundation of combat magic has been twisted into a crude shadow of its former self. To the bafflement of his contemporaries, Mathias’s flawless crest is misread as a mark of failure, and everyone around him dismisses him as talentless. Surrounded by ignorance that mistakes his genius for incompetence, the greatest sage must now navigate a world that has forgotten the very laws of magic he once wrote. With no one to teach and everything to prove, he sets out to revolutionize a broken system, determined to show that his so-called "defective" crest is, in truth, the key to becoming the strongest ever known.