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 55
Powerful Shaman greatly respected by Lizardmen. Currently, he is hiding out in a corner of the plains. He resents that humans continue to take away Lizardmen's territory where they've lived since ancient times. He also hates humans attacking Lizardmen that live in peace.