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 40
Lizardman mystic ruling Delu Lizardmen with superior insight and wisdom. He is known to have learned directly under Hardin. In the beginning, he considered peaceful co-existence with humans, but became angry at the stupidity of humans blindly treating them as hostile despite his continuous efforts. Now, he became a violent being who slays all the intruders in his tribe's territory.