This is a Rage Power option.
- While you're raging, you do not suffer any negative effects from the dying condition, being below 0 hit points or exhaustion. If you're dying, you must still make dying contest checks, and you suffer the normal effects of taking damage while at 0 hit points, accumulating exhaustion. However, if you would die due to exhaustion, you don't die until your rage ends, and you die then only if you still have 0 hit points, else you reduce your exhaustion 1 level.