The Price of Freedom
Whenever you hit an enemy with a melee or a close attack, you gain temporary hit points equal to your Constitution modifier, plus any temporary hit points normally granted by the power. You gain the hit points only after the attack is resolved. If you use an invigorating fighter attack power and miss every target with it, you gain temporary hit points equal to your Constitution modifier. You gain the hit points only after the attack is resolved.
When you gain temporary hit points by hitting with an attack that has the invigorating keyword,
those temporary hit points stack with any other temporary hit points you already have.
When wearing light armor or chainmail, you gain a +1 bonus to damage rolls with melee and close
weapon attacks whenever you have temporary hit points. This bonus increases to +2 if you’re wielding an axe, a hammer, a mace, or a pick.