100% Hit Chance
Sings to the target, causing them to become drowsy.
Drowsy targets will fall asleep at the end of next round unless hit.
Drop: Nalash Verdantis 
Zone: Dread Wastes
Approximate Drop Rate: 1 in 10
Pet Battle: [1-2] Elwynn Forest
Pet Battle: [24-25] Vale of Eternal Blossoms
Vendor: Corporal Arthur Flew
Cost: 40 (unlimited supply)
Drop: Reliquary of the Lost [??+]
Zone: Black Temple
Approximate Drop Rate: Unknown
Pet Battle: [3-6] Loch Modan
Pet Battle: [23-25] The Jade Forest
Pet Battle: [23-25] Kun-Lai Summit