Horse hopes to find the final shaman in Merfolk Town. But she's growing discouraged — and looking more and more like a centaur every day.

The herd makes it to the Rift and reminisces about their time together while waiting for Waterbaby to arrive with the final piece of the key.

All of Centaurworld's residents gather for the hootenanny. But can Horse turn this colorful collection of creatures into a fearless army?

Horse leaps into the Nowhere King's mind and learns his haunting backstory. Meanwhile, Rider and the herd come up with a plan.