Stalwart BeltLevel 6+ Uncommon

Each time you deal a grievous wound to an enemy, you feel the invigorating power of this belt.

Waist Slot

Property

When you score a critical hit, gain temporary hit points equal to your Constitution modifier.
    Level 16: Equal to twice your Constitution modifier
    Level 26: Equal to three times your Constitution modifier

Published in Adventurer's Vault, page(s) 167.