If a character is reduced to 0 Health Points remaining then they fall Unconscious. A character who is unconscious at 0 HP must pass an Endurance test on their turn. If they fail a number of tests in excess of their Luck bonus while unconscious, then they die. Taking damage at least once causes the character to fail the next test. If an effect would Stabilize them (this can be done with a Survival (Skill) or Profession [Medicine] skill test and a healer’s kit) or bring them above 0 HP, then they stop testing.