• Spinal Reaper
• Item Level 76Disenchants into:
  [Nexus Crystal]: 1-2
• Binds when picked up
  
• Axe
• Two-Hand
  
• Speed 3.40
• 203 - 305 Damage
• (74.7 damage per second)
• Durability 120 / 120
• Requires Level 60
• Equip: Restores 150 mana or 20 rage when you kill a target that gives experience; this effect cannot occur more than once every 10 seconds.
  Equip: Increases attack power by 34.
• 
• Sell Price: 10 3 75

As this returns mana (or rage) when you kill a target, is is mostly of use to characters in a damage dealing role than those in healing or tanking roles.

Source

This item drops from Ragnaros in Molten Core.

External links

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