Staff of the Aqua Fairy (3.5e Equipment)
From D&D Wiki
Staff of the aqua fairy is a staff passed down to the children of Aquarius. This weapon can only be obtained through slaying a celestial or by having it passed down to down to you as a symbol of adulthood from Aquarius herself.
By carrying this staff you are infused with powerful fey magic, granting you many of the traits and abilities of a nixie (MM 235). Upon aquiring this staff, you gain a swim speed of 30 feet. You can breathe underwater, and you gain low-light vision and damage reduction 5/cold iron. You also gain a +6 enhancement bonus to Dexterity, a +2 enhancement bonus to Wisdom, and a +8 enhancement bonus to Charisma.
You also gain the following Spells: Cloud burst 3/day http://dndtools.eu/spells/spell-compendium--86/cloudburst--4033/ Water Walk 3/day http://dndtools.eu/spells/players-handbook-v35--6/water-walk--2894/