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 43
Knight of Elmoreden who is the commander of the research squad investigating the Tower of Insolence by the command of General Karte. Like the general, he has an immortal body. As the right arm of General Karte, he is a brave knight who can even go to Hell if ordered. He received the powerful secret from Devil Rahha, and has been watching out and investigating Tirak who participated in the research squad given Rahha's warning.
Мужики, не тупите. Здесь есть целый раздел о РБ. Заходите туда и смотрите. Там все написано - сколько гвардов, какой лвл, что они из себя представляют. Учитесь пользоваться базой.
Барион
http://l2db.ru/npc/location/10044/interlude/