Your spirit is unusually tenacious, and death does not become you.
Prerequisites: Con 13, character level 5th.
Benefit: You do not die until reduced to twice your Constitution score, expressed as a negative number (for example, a character with a 13 Constitution does not die until they are reduced to -26 hit points or lower).
Normal: A character without this feat dies when reduced to their Constitution score, expressed as a negative number.