Stuff of Nightmares

Stuff of Nightmares
Raid Finder
Item Level 483
Upgrade Level: 0/2
Binds when picked up
Unique-Equipped: Stuff of Nightmares (1)
Trinket
+41 Mastery (1.78 at L90)
Requires Level 90
Sell Price: 25 9 39
Dropped by Tsulong - Terrace of Endless Spring.
Upgrade Level: 0/2
Winnable by the following class specs:
Warrior:
Paladin:
Death Knight:
Monk:
Druid: