• Reclaimed Thunderstrike
• Item Level 232Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Polearm
• Two-Hand
  
• Speed 3.10
• 577 - 866 Damage
• (232.7 damage per second)
• +78 Agility
  +157 Stamina
• Durability 120 / 120
• Requires Level 80
• Equip: Improves haste rating by 55.
  Equip: Increases your expertise rating by 62.
  Equip: Increases attack power by 167.
  Chance on hit: Blasts up to 3 targets for 150 to 250 Nature damage. Each target after the first takes less damage.
• 

Source

This item drops from Onyxia in the 10-man version of Onyxia's Lair.

Patch changes

• Patch 3.2.2 (2009-09-22): Added. 
  

External links

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