I came up with the story that was going to go with this picture back when "objects become living ponies" was popular. I took the idea to the extreme and asked, "what would happen if a blackhole became a pony?" In the story, she would have incredible physics breaking powers very similar to high level magic, an unquenchable curiosity, but also be utterly naïve of social norms and what it means to be a pony. Twilight and the world would have to teach her how to behave, what emotions are (which are confusing her even as she experiences them), and the value of friendship. However, everyone is also deeply afraid of her. She is, after all, a living blackhole that could eat the entire planet on a whim.

An all powerful being who is also utterly clueless about what it means to be alive or a pony. Cute and deadly.