Celestia and Luna are the fusion of the founders of Equestria.

That's why alicorns did not exist in Heartswarming Story. They fused into Celestia and Luna cause Elements of Harmony. Or Discord. One of those two.

Also I definitely need to write that shipfic between Discord and the Tree of Harmony. That's my fanon idea of how Screwball was made.

I know I could hardly beleaf it either.

That is all