Enter an ethereal state, avoiding all attacks the round it is used.
This ability always goes first.
Vendor: Master Li
Zone: Timeless Isle
Cost: 3 (unlimited supply)
Quest: Mastering the Menagerie [??]
Zone: Lunarfall, Frostwall
Drop: Big Bag of Pet Supplies
Approximate Drop Rate: Unknown
Quest: The Huntresses 
Zone: Shadowmoon Valley (Draenor)
Achievement: An Awfully Big Adventure