In the story, the villain's hair is described as a portal to eternity. Essentially, it's like Luna's mane if her mane was a window into space. The villain's mane in this story also changes based on her emotions. When she's thinking hard, shooting stars may fly by (like in the image) and when she's angry, a supernova will go off. When she's REALLY angry, her mane will engulf in flames like the sun. I wanted to show this in an animated GIF so here you go.

I have removed the MARVEL-esque logos above the titles (as seen with Autumn Blaze) and have added the "Equestria Expanded Universe" title at the top so that fics that didn't have the MARVEL-esque logo (like with Fillydelphia Freedom 1+2) now have EEU branding. In addition, the ones that were in their own spin-off universe (Chaos Reigns + Crystal Starship) now have the EEU title to make it clear they are in the same universe/multiverse. Everything is still color-coded to help understand