You can create a water guardian.
Benefit: 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 | Water Elemental Summoned |
|---|---|
| 1st-5th | Small |
| 6th-10th | Medium |
| 11th-15th | Large |
| 16th-20th | Huge |
Special: You can select this feat multiple times, gaining one additional daily use each time you take it.
Special: If you have the ability to turn or rebuke undead, you gain one additional daily use of this feat for each daily turn or rebuke use you expend.
Source: Complete Champion, page 64.