Bonereaver's Edge is a two-handed sword that can proc an effect to ignore a portion of your target's armor.
Source
Bonereaver's Edge drops off Ragnaros in the Molten Core in Blackrock Mountain.
Notes
- This item's drop rate is approximately 5%.
- Since a recent patch, the proc effect is a buff on the player wielding the sword and therefore stacks with the sunder armor debuff.