Inter-Dimensional Locust

Summary
Inter-Dimensional Locust are insect monsters. They gather in large swarms and are very deadly.

These monsters appear out of serval rifts in the sky during the events of the Second wave and attacked the nearest village called Riyute.

When killed nothing of value is dropped that could be sold, however, the material can be used by the Legendary Weapons to unlock a new variation of weapons via absorption.

They are generally only good for exp gain.

Debut
Anime: Season 1, Episode 3

Manga: Volume 2, Chapter 6

Light Novel: Volume 1, Chapter 20

Web Novel: Chapter 20