Once upon a time, an evil Cragster by the name of Wrocke was fighting a Wiztastic named Alazum for his wand, which accidentally caused the wand to send an energy-filled beam towards Mixel Moon, creating a giant crater on it. The Mixel Moon looked like an eye, and whenever its crater faced Mixel Land, OPPOSITE DAY TURNS EVERYONE WILD! And so, this phase of the moon was known as "Opposite Moon" to this day.