The Strongest Sage with the Weakest Crest 22 (manga)

Matty’s newly built dracopulse observation station picks up some unusual activity. After analyzing the data, the worst fears are confirmed: an elite demon has appeared and created a monstrous army of abominations. Matty and his team manage to locate the demon and head out to face the newfound threats. The demon proves to be manageable, but the army of abominations simply refuses to die, even when pounded to pieces! What can Matty and his team do against an enemy that can’t be slain?!