Hell Moth

Hell Moths (地獄蛾) are B-ranked monsters, that live near the former Ogre village.

Silk can be harvested from Hell Moths. To be more precise, it's from the pupa. If the larva grows into a hell moth, it is a powerful monster with bewitching powder that is ranked B, however, during its transformation, it is perfectly harmless. So one looks for cocoons and gather those.