• The Lady's Promise
• Item Level 232Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
• Unique-Equipped
• Finger
• +76 Strength
  +76 Stamina
• Requires Level 80
• Equip: Improves critical strike rating by 47.
  Equip: Increases your expertise rating by 40.
• Sell Price: 7 56 23

Source

This item can be found inside The Captain's Chest after escaping the Lich King in the Heroic version of Halls of Reflection.

Patch changes

• Patch 3.3.0 (08-Dec-2009): Added. 
  

External links

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