Blizzard Entertainment has announced broad modifications to the drop rates of all Pandaria and Draenor world boss mounts, dramatically improving the chances of receiving them. The former drop rate probability for the Heavenly Onyx Cloud Serpent was 0.01%, with the additional complexity that players in World of Warcraft could only loot the monster once. The present drop rate is unclear, and it will most likely take at least a month of loot attempts from the World of Warcraft community before database services such as Wowhead can generate an accurate estimate.
