Aquatic [Property]

This weapon has a silvery-blue tinge, like the sheen of white scales in sunlight.

While wielding an aquatic weapon, you do not incur any penalties that would otherwise apply to using the weapon underwater, as though you were affected by a freedom of movement spell.

Prerequisites: Craft Magic Arms and Armor, freedom of movement.

Cost to Create: 1,000 gp, 80 XP, 2 days.

Source: Magic Item Compendium, page 28. A more expensive version of this property was published in Stormwrack, page 129.