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.
BOSS Mortal Blow
Raid Boss - Level
Immortal Warrior dispatched to protect the Seal of Antharas under the leadership of Watchman of the Land Dragon Antharas at command of Emperor Elmoreden. However, he was changed to a cruel monster that attacks anyone who approaches the Dragon Valley after straying away from the supervision of Watchman due to the influence of the dark magic prevalent in the area.