Luna's life since the banishment of the Nightmare has been better than the past thousands of years. Ponies respect her, they don't run in fear, and she has....friends.
But when she fears the Nightmare is resurfacing, she dives into her mind to find out what is going on.
Luna wasn't expecting herself.
Cover art taken from This page, who I hope is the rightful owner.
...well that's an interesting take...
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I'm glad you enjoyed it!