Editing DnD Desert Raiders Campaign Natural Hazards (section)

==== SIDEBAR - SUFFOCATION IN A SANDSTORM ====
Exposed characters might begin to choke if their noses and mouths are not covered. A sufficiently large cloth expertly worn (Survival DC 15) or a filter mask (see page 100) negates the effects of suffocation from dust and sand. An inexpertly worn cloth across the nose and mouth protects a character from the potential of suffocation for a number of rounds equal to 10x her Constitution score. An unprotected character faces potential suffocation after a number rounds equal to twice her Constitution score. Once the grace period ends, the character must make a successful Constitution check (DC 10, +1 per previous check) each round or begin suffocating on the encroaching sand. In the first round after suffocation begins, the character falls unconscious (0 hp). In the following round, she drops to -1 hit points and is dying. In the third round, she suffocates to death.