Conditions

Safeguarded
While you have the Safeguarded condition, you become the lowest priority for monsters and they target you only when no other targets are available, and even then they might ignore or subdue you instead of killing you. Even at 0 hp you remain conscious and usually able to take one action each turn - you are permanently Slowed 2 while you have the Safeguarded condition.

You gain the Safeguarded condition by spending all your remaining Hero points to avoid death.

As soon as you take a hostile action, or gain any healing, you lose the Safeguarded condition.

Vulnerable
When a non-notable creature with the Vulnerable condition reaches 0 hp from Non-Lethal Damage it makes a flat DC 15 check: success it’s unconscious and stable; failure it is dead.

If you make a lethal attack against a bloodied creature it gains the Vulnerable condition.

When a creature is no longer bloodied it automatically loses the Vulnerable condition.