If the person who made the greatest contribution is 3 or more Lv.s higher than the raid monster, then the item/Adena rewards will decrease. If the difference is 9 or more Lv.s, the monster will drop nothing at all.

A wicked Spider that once lived in the Wastelands while Beleth was free. After Beleth was sealed away, the Spider was chased away by a colony of Ants, empowered by M. Atk. of the Wastelands. The Spider was forced to retreat to this place. It swears that someday it will feed on the Ants and destroy them. It quietly grows in power while sharpening its fangs for vengeance.

They consist of insects, spiders and worms and act upon their highly refined instincts. Sometimes their instincts present themselves in a more developed form than that of humanoid society.