If the level of the person who made the greatest contribution is higher than the level of the raid monster by 3 or more levels, then the probability of dropping an item or adena will decrease. If the level difference is nine or more levels, then, the monster will not drop any item or adena.
Raid Boss - Level
Monster Dragon known to have come out of Goddess Shilen's nightmare. However, it is one of the Spirits of Darkness rather than a monster directly born to Shilen. It is more like a Shadow summoned by necromancers. While living on earth, it took the form of a dragon which living things were most afraid of.