• Relentless Gladiator's Libram of Justice
• Item Level 251Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Libram
• Relic
• Requires Level 80
• Requires personal and team arena rating of 1800
• Equip: Increases spell power of Flash of Light by 436.

Source

This item is sold by the following vendors for 6,400 350 :

•  Big Zokk Torquewrench <Arena Vendor> in Netherstorm
•  Evee Copperspring <Arena Vendor> in Gadgetzan
•  Nargle Lashcord <Arena Vendor> in Dalaran

Patch changes

• Patch 3.2.0 (04-Aug-2009): Added. 
  

External links

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