The Stalwart Belt of Daimyo Koku
Each time you deal a grievous wound to an enemy, you feel the invigorating power of this belt. The belt itself is made of interlocking black and white chains.
Item Slot: Waist
Property: When you score a critical hit, gain temporary hit points equal to your Constitution modifier +1.
Koku was one of the Daimyo (Lords) of the East, and controlled the western province of Okuto. He was mortally wounded in battle against the Dragon Kursk after the Dragonfall, but his retainers managed to recover his body and this belt.