Applies to Zweihander, Legionnaire, Juggernaut and Royal Guard.
Based on your body armour value of your body armour and gauntlets.
Represented by a green bar below your main health bar.
Once your normal health is depleted, you will tap into your extra health.
When the extra health is keeping you alive, you will become immune to stuns.
Regenerates after not receiving a hit for 10 seconds and for 5 health every 5 seconds.