Boon of Urgarok The Endurer

Epic Boon Feat (Prerequisite: Only bestowed upon a totem pole barbarian who has deemed themselves worthy of Urgarok)

You gain the following benefits.

Armor of the bear. When your health drops to half, your armor class automatically increases +2

Primordial Rage. As a reaction, only while raging, your attacks become infused with the fury of Urgarok. When you hit an enemy that is at half health, they take double damage from your attacks. This effect lasts until the start of your next turn.