Boltstrike58, hand me my thonk emote!

Twilight stared directly into the disembodied camera that has been filming every chapter of What If this entire time. "Accidentally?"

Princess Big Mac swooped past in the background.

"Look all around you!" Twilight threw a hoof out. "Everypony is an alicorn now! And when everypony's an alicorn... nopony's an alicorn."

"Twilight, please--" Celestia landed beside her former student. "You have to stop thi--"

By the power of thirty nearby alicorns, the sun was accidentally sent hurtling into Equestria, incinerating everything known to exist.