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
Basilisk that obtained intelligence after mutating based on the influence of dark magic which polluted the Wasteland. He is bigger and stronger than other Basilisks, and has taken the weak ones as his inferiors with the power. He strongly hates other tribes around him. Due to his hatred, he kills every living thing seen before his eyes.
Giant Wasteland Basilisk
