In this manga adaptation of the popular light novel series, the world's strongest sage will stop at nothing to get stronger... not even reincarnation! Is former Strongest Sage Matthias's fight to protect mankind finally over... or is it just beginning?! Once the world's most powerful sage, reborn Matthias has gained the optimal crest for magical combat many thousands of years in the future. But with magical knowledge at an all-time low in this new era, no one recognises Matthias's crest for what it is. It turns out that the demon tribe is responsible for spreading misinformation about crests and causing an overall decline in humanity's magic capabilities, leading to Matthias's battle against the demons who seek to destroy humanity! His latest foe is the demon Zaridias, who has concocted all manner of schemes and thrown one flunky demon after another at the party. Matthias declares that he and his team can't measure up to such an overwhelmingly powerful foe at their current strength, but who will be left standing at the end of the fierce battle?!