Pattern: Mooncloth Circlet

Source
This item drops from Nefarian in Blackwing Lair and creatures in Ruins of Ahn'Qiraj, Temple of Ahn'Qiraj, and Molten Core. It may also be contained in Eternium Lockbox.

This pattern is extremely rare - the rarest of the Mooncloth 'set' - and can sell for large amounts to dedicated collectors.