No  MistressVoluptas,  that is the spell elemental protection from the main book not a skill. You cast that and it lasts for an hour or so. But you can cast it on other people as well. If you take that you can spend 1 hour breathing under water for 2 PP per hour. If you get a raise the cost is 1 PP per 2 hours. When the time is up you just spend more PP To keep it going. You may have the spell work on up to 5 people as long as you pay the same amount of PP for everyone. So if you want all the player characters to breathe underwater for 1 hour it would cost 10 PP.