Slow Respiration: A character with this proficiency has the
ability to enter a deep trance and greatly reduce the amount of air
he needs to stay alive. In order to induce the trance, the character
must be in a restful position, either sitting or lying down. After
concentrating for one turn, the character’s pulse and breathing
rate drop well below normal, so that he uses air only 10% as fast
as when resting.

The character can emerge from his trance at will. He is fully
aware of anything happening nearby while the trance is in effect.
 
 
Adventuring Skills - - - DSG