"You will learn to fear the night"

(You) are a villain. Congrats. Princess Luna is unhappy with you being a villain, and intends to royally curb-stomp you until the sight of a waning crescent makes you fear for your life.

Story: Luna's doing dream duty when she senses something wrong, a wave of nightmares flooding Equestria. She returns to the waking world and notices (you), doing a little bit of evil, and decides to nip it in the bud.

Details on your character are vage, and your backstory is whatever you want, so your OCs and personas can take turns 1v1'ing the Princess. I gave her a bunch of OP powers that I think vibe with her.

Pic goes hard: Link