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!Life at the Second Royal Academy starts off with a bang for erstwhile sage Matthias. When a demon infiltrates the school, it's Matthias who takes him out using his shiny new magical crest. But while Matthias might have won this battle, he's also just started a war! Thanks to Matthias's victory, the demon realm begins preparations for invading the human world! Will Matthias and his true power be ready and waiting for them?