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
Powerful Death Lord that came up from Purgatory upon the request of Death Lord Hallate. Unlike Hallate who spent most of his power on breaking the seal of the Tower of Insolence, he has reserved most of his power from Purgatory. Unlike Death Lord Ipos, he does not have a relationship with humans, or acts alone without listening to Hallate. Finding pleasure out of slaughtering and massacring, he lives on the Killing Ground at present, and spreads the spirit of purgatory and death.