The Indomitable Primal Diamond is one of Wrathion's Crown of Heaven meta gem purchased in exchange for 5x from the Blacktalon Quartermaster behind Wrathion in the Tavern in the Mists. This gem is designed for tanks. Casters, melee and range attackers, and healers each have their own gem.
The "chance to gain a reduction to damage" has a 1.40 Real PPM on damage/absorb taken from melee ability or swing. There is no internal cooldown on the proc.
Patches and hotfixes
- Patch 6.0.2 (2014-10-14): No longer a quest reward.
- Hotfix (2014-11-15): Resolved an issue causing the Mists of Pandaria Legendary Cloaks and Metagems to remain effective for level 100 characters.
- Hotfix (2013-04-16):
- Socketing a legendary Meta Gem (Capacitive Primal Diamond, Courageous Primal Diamond, Indomitable Primal Diamond, and Sinister Primal Diamond) to a bind-on-equip helmet now causes the helmet to become soulbound.
- Indomitable Primal Diamond should now properly have a chance to activate the Fortitude effect received from all damage sources, not just from auto-attacks.
- Patch 5.2.0 (2013-03-05): Added.