Water

Water is an elemental liquid that sometimes used as a beverage or makes up a body of water.

History
Rainbow Dash dowsed Twilight Sparkle in a rain cloud of water. When upset at the Cutie Mark Crusaders, Rainbow Dash made a rain cloud above them, soaking them wet. While swimming at a beach, Twilight nearly drowned in the ocean. The Main Six were infected with Ethical Cancer when they relaxed in the Dark Water. The Cutie Mark Crusaders defeated Empress Twilight Sparkle by soaking her with water.