As title states, the below item (charm) is apparently a potential reward. I must have done this quest 30 times or more and not once has it dropped. Soon it wont even be an upgrade.
It dropped for me once when xpack launched, but now im trying to get for alts, running multiple toons per day for weeks, and nothing.
That adorn is only worth getting if you have double purple slot charms. VR, focus defense, or critical thinking are better for charms.
The Bottled Wish just dropped for me today after weeks of running it on various chars. Very rare drop indeed,