The Strongest Sage with the Weakest Crest 18

In this manga adaptation of the popular light novel series, the world’s strongest sage will stop at nothing to get stronger…not even using himself as bait!
A chaos demon with greater power than Zaridias will soon be revived. Such a powerful demon is beyond what Matthias and his friends can handle, but an ancient sword may be able to give them a chance. However, the ancient weapon is sealed in a casket that is guarded by an incredibly powerful elite demon and in order to obtain the weapon, Matty must use himself as bait to distract the demon!
Story Locale: The fictional Kingdom of Eis (alt medieval Europe) Series Overview: The world’s strongest sage will stop at nothing to achieve greatness…not even reincarnation! But while his rebirth goes better than he could have hoped, Matthias lands in a world where no one recognizes his potential. Now it’s up to him to prove everyone wrong!