Rune of Atheron's Shield (IV)

+10% Critical Hit Chance.

Critical Hit heals 5% of Max Health.

Rage Shield provides an additional 20% Critical Hit Chance and 50% Critical Hit Damage.

Each cleared boss encounter of level 40 and higher has a 2% chance to drop a rune (1.5% on mini-boss stages). On Inferno 0.5% of those runes are Set Runes before the stage's loot bonus and Item Find, which raise it; on Normal and Nightmare no Set Rune drops. Only runes for the current hero's class drop.