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When your character’s hit points drop to a negative amount equal to or greater than his Constitution score, he is dead. A character may also die from taking ability damage or suffering an ability drain that reduces his Constitution score to 0.
When your current hit point total drops to 0, you are disabled. You gain the Staggered condition (you may only take a move action or standard action each turn. If you perform a standard action or strenuous action during your turn, you take 1 point of damage after completing the act).
DYING, CONSCIOUSNESS, AND STABILIZING
Consciousness Check: A DC 10 Constitution check with a modifier equal to the number of hit points below 0.
Stabilize Check: A DC 10 Constitution check with a modifier equal to the number of hit points below 0.
If your hit points fall below 0, you are Dying. You gain the Staggered condition and have a chance of falling unconscious. The moment your hit points fall below 0, roll a Consciousness check. If you fail the check, you fall unconscious and will remain unconscious until you have been healed to 0 or more hit points. At the end of each turn, conscious characters must also make a successful Consciousness check to remain conscious.
A Dying character with the Die Hard feat or Ferocity does not need to make a Consciousness roll. They may choose whether they succeed to fail each round. Once they decide to fail the roll, they fall unconscious and remain unconscious.
When you are Dying, you will take 1 point of damage at the end of your turn unless you make a successful Stabilize check. If the Stabilize check fails, you take 1 point of damage and may attempt a new Stabilize check at the end of your next turn. If the check succeeds, you are considered to be stabilized and will not take any more damage from Dying. However, if you take new damage you will need to make new Stabilize checks.
If you are Dying and you choose to take a standard action or strenuous action during your turn, the Stabilize check automatically fails. This results in a 2 hit point loss (1 for the standard action and 1 for the failed stabilize check) and you must make a Consciousness check to remain conscious.
Characters taking continuous damage for affects such as Bleed or Acid Arrow automatically fail Stabilize checks.
Any healing that cures 1 or more point of damage will stabilize a Dying character. Healing that raises your hit points above 0 makes you fully functional again, just as if you’d never been reduced to 0 or fewer hit points.
You can keep a dying character from losing more hit points and make him stable with a DC 15 Heal check. A character who attempts to bind his own wounds does so at -5 to the Heal check.
RECOVERING WITH HELP
One hour after a tended, a dying character becomes stable, the character must make a DC 10 Constitution check to become conscious. The character takes a penalty on this roll equal to his negative hit point total. Conscious characters with negative hit point totals are treated as disabled characters. If the character remains unconscious, he receives another check every hour to regain consciousness. A natural 20 on this check is an automatic success. Even if unconscious, the character recovers hit points naturally. He automatically regains consciousness when his hit points rise to 1 or higher.
RECOVERING WITHOUT HELP
A severely wounded character left alone usually dies. He has a small chance of recovering on his own. Treat such characters as those attempting to recover with help, but every failed Constitution check to regain consciousness results in the loss of 1 hit point. An unaided character does not recover hit points naturally. Once conscious, the character can make a DC 10 Constitution check once per day, after resting for 8 hours, to begin recovering hit points naturally. The character takes a penalty on this roll equal to his negative hit point total. Failing this check causes the character to lose 1 hit point, but this does not cause the character to become unconscious. Once a character makes this check, he continues to heal naturally and is no longer in danger of losing hit points naturally.