Mystic Groves are rare biomes scattered across the world. There are several biome exclusive items and blocks, such as Magic Trees, Pixies, and Hot Springs. It consists of purple waters and rare glowflowers and also beautiful trees and some posion pools.
The biome has a blue-ish/pink sky hue as well as purple water, giving it a "fantasy" feel. There is a multitude of flowers and flowering oaks as well as oak trees. You will also find Glow Flowers here, which provide light. All of this together is truly beautiful, and I suggest, if you're in creative, finding one. It's absolutely beautiful.