Dying: If you are reduced to below 0 HP, you are dying (as well as being helpless, debuffed, and knocked prone). At the start of their turn a dying creature must make a Fortitude save, DC 15 + 10 for each round you have been dying. If they get a success they are returned to 0 HP. After 3 rounds of dying, you are dead. If you are healed for at least 10 HP, you are no longer dying.