Ereinus

The monster "Calamity of Despair," which appeared in the third season of the anime, is a powerful raid-class enemy at level 65. This monster possesses a troublesome ability that reduces the levels of all adventurers within a specific instance to 35. As a result, except for the ancient species called the Mofur Sisters and Akatsuki, who had temporarily lowered her level the day before the incident using the "Master System," all high-level adventurers, including Shiroe, were forcibly reduced to level 35.

Furthermore, this monster has a wide-area attack that shatters adventurers' precious memories and causes them to fall into despair, dealing both physical and psychological damage. This attack is extremely difficult to deal with for the adventurers.

Within the monster itself, there exists an entity called the "Calamity of Aspiration," a level 35 unit, which was the source of the effect lowering the high-level adventurers' levels. However, after being exposed by Lelia's attack, Minori utilized her "Full Control Encounter: Limited," turning the tide of the battle, and the monster was ultimately defeated.