Eternity is something that can never be reached. Even Equestria's princesses won't live forever. The end, however, comes much sooner than anypony expected.
Twilight Sparkle faces social ostracization when a crystal is discovered to contain the lost Princess Luna and must look past those social norms in order to learn more about this strange mare.
Certain alicorns have no regard for the rules of space and time. An astral sub-dimension becomes a potent weapon in what appears to be a divine prank war. Shining Armor hits the sauce.
Twilight is angry. Normally, a more calm approach would be useful, but when a pony... When a pony commits THAT, well, the chips are off the table. Justice must be extracted.
Celestia invents a way to transport whatever she wants from the farthest reaches of the galaxy to her. Certainly, this will turn out to be a good thing in the end, right?
Loki Odinson of Asgard has fallen from grace, only to find himself in an unknown realm. Reaching out to him is Princess Luna, whom he shares many similarities with. Will Loki take her help and get better, or will he spurn it because of his arrogance?
Lunar Limbo is a cold place, made even colder with a being whose only purpose is to augment one’s negative emotions and one’s desires, who insists that Luna was right to try to take over.
A young woman finds herself in an unexpected situation that her studies in veterinary science cannot prepare her for—awakening in a strange world in the body of a creature named Nightmare Moon.
A thousand years ago, Princess Celestia banished her sister to the moon, that much we know. What wasn’t known, and what Celestia kept secret was that before her banishment, Luna had given birth to a foal; Twilight Andromeda Sparkle.
When Princess Luna heard of Snowdrop's wish that she wanted to see the world, she determined that she'd somehow help her realize it. She walked into her dream, and granted her dream vision -- not knowing what the consequences would be.