What If.....the Princess was a Keyblade Wielders?

*walking in the beach looking to the sky full off Stars, but without the moon in the backgroung i walked humming a song of my people, thast when i stop and stop by and sign to my sign there was a was wich a concerned face looking up to me*
Princess Luna?
- Sorry Mickey.... *Holding a Keyblade with my magic aura ( The Rainfell ) point at him*
* from my shadow appeared a Nightmare moon with yellow eyes ( The Star Seeker ) was in another aura *
~ But you are Too Late..

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My Another Idea that i like to play from times to times.....what if Princess Luna Want found a Second keyblade from her Sister (Nightmare moon), what keep her reing here, hidden on the moon,when she came back from the imprisionament from the moon she found the Keyblade and the both of them have a battle that both of them simply destroyed each other? When each of the our combatatens tends of wounds we see that life dont see that bad, but again even with great powers, always comes great consequences......