The Moon (Biome)

The Moon is a special War Mode biome that appears when you ride a Moon Rocket. After riding a Moon Rocket, the item will disappear and you will see the moon right in front of you. Also in the background, you see the earth instead of the moon.

How to get back
The only way to get back is to either use the Magic Mirror, or use an additional Moon Rocket if you have one. Though it is recommended to use the Magic Mirror since it’s too costly.