“There can only be one Princess in Canidia!”
I mentioned a while ago when I designed the My Little Wolf-Princesses that, given how wolves are more likely to stay up at night Luna was always the more popular of the two in this universe, leading to Celestia being corrupted and spending 1000 years in the sun. This image is heavily referenced from a screenshot of Nightmare Moon’s rise. Not traced though. That’d be difficult since Sun Flare is a wolf, not a horse.