When does Mixels return?

Mixels is a 2014-2016 comedy animated television series that aired on Cartoon Network. The series first aired on February 12, 2014, with a new episode of Teen Titans Go!. The series revolves around the Mixels, small creatures that can mix and combine with one another. Mixels are opposed by the evil Nixels, a small, discolored and evil creatures led by King Nixel.
Mixels consists of 24 tribes who each have a different color scheme and inhabit a fantasy landscape. These creatures can Mix (a two-Mixel combination), Max (a three-Mixels combination), and Murp (a failed Mix) in all kinds of situations.