Since Sunburst had decided to experiment with the fusion spell with Thorax and Starlight, Twilight also wondered what an interspecies fusion would be like. Fortunately for her, she gets the chance. Multiple chances. Gilda, and Ember all come visit, and Twilight decideds to ask if they would participate in a fusion with a pony. Fortunately, they agree.

This is taking place during the same time that The Multi-Fusion is happening, so the fusions have limited time.