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 70
Reaper, the page of Goddess of Death Shilen, in charge of collecting innumerous souls wandering about on earth and bringing them to the underground world where Shilen lives. His loyalty to Shilen is absolute, and he stays close to the Seal of Shilen in order to serve the goddess at a close distance. He restlessly carries out his duty, waiting for the day of the goddess's resurrection.