For the entire history of RuneScape, we have been extremely secretive of what the chances are of obtaining rare loot from PvM, be that from Slayer creatures or from the numerous boss monsters that we have since released. From today, we'll no longer hold people in the dark about what the chance to obtain a rare drop from a boss monster is all part of our effort to be more transparent with you guys, the players. Rolling a d6 and then multiplying it by 1,000.