Negative Hit Points

Each PC/Opponent falls unconscious or incapacitated at 0 hit points, and will be dead when they reach the negative of their Constitution score. Injuries that cause more than half a weapon’s max damage will need tending (i.e. Stop bleeding, bandaging, magical healing), if these wounds are not tended to they will cause 1 point of damage per round.

This bird has negative HP

Negative Hit Points

Sanctuary Saga Jyhazen