• Hortus' Seal of Brilliance
• Item Level 115Disenchants into:
  [Large Prismatic Shard]: 1 (99.5%)
  [Void Crystal]: 1 (0.5%)
• Binds when picked up
• Held In Off-hand
• +20 Intellect
  +18 Stamina
• Requires Level 70
• Equip: Increases spell power by 23.
• Sell Price: 2 20 45

Source

Drops from Warchief Kargath Bladefist in the The Shattered Halls, the 3rd wing of Hellfire Citadel on normal difficulty. Likely a reference to Blizzard Entertainment poster Hortus, who helps people in the tech support forum.

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB