Once per day as a standard action, you can pour the contents of a full waterskin on the ground and summon forth a water elemental on that spot. The creature remains and follows your commands for 1 minute. The size of the elemental is based on your character level, as given in the table below.
Character Level
1st-5th
6th-10th
11th-15th
16th-20th
Water Elemental Summoned
Small
Medium
Large
Huge
You can select this feat multiple times, gaining one additional daily use each time you take it. If you have faith, you gain one additional daily use of this feat for each daily uses of faith you expend.