Two voices shouted as one, one hers, the other almost foreign.
There was white, nothing but white light as a spell flooded to life and three Elements glowed with a horrible and dangerous light. It blinded her even though she could stare straight into the sun without protection. It hurt her, even though this was a light she had used on foes before them. Then it devoured her entire being without a shred of mercy. It pushed its way past the eyelids, dug itself into the retinas, burned its way into the brain and then made itself comfortable as the scream became a holler of anger and fury.
How is she doing this?!
She could barely make out the words that were called out to her as the world collapsed around her and flesh warped as she became a part of the vileness that swam all around her. Light bended and in turn her body followed the odd twists and shifts of angles as matter became particles and particles moved like currents- her whole body acting like the waves of an ocean or the push and pull of the tides--
How is she doing this without all the Elements?!
She would never get to ask her question because all that came was the scream as they were enveloped in light and the ruined castle shook, as the ground vibrated then trembled, and a thousand of her soldiers with a thousand of her minions all freezing at the sound of their leader's defeat.
There was an explosion as a pillar drove itself through five floors of stone, widening the holes from their fight, and creating a sonic crack that sent a breeze across the forest that made the fighting between forces stop as everypony and every thing went silent and stared.
Hundreds of eyes looked up to the sky. All of them wide. All of them watching. For seconds, two armies loyal to two different Princesses forgot about the battle and could only stare up as they watched something unnatural take off into the sky. A pillar of light that demanded their attention, brought comfort to some in its glow while it brought fear to the tainted that saw it.
The silence stretched for seconds as the pillar climbed higher and higher, a spear of light that went straight towards the eclipse where Moon blocked Sun and bathed the world in an eery glow.
Then without hesitation every one of her own troops, every one of her minions in this rebellion felt the grip of fear as that light flared with the echoes of her protests and their leader was taken with it. Their muscles unfroze. Seventeen thousand souls shared one single thought at that exact same moment and it was to run. They turned and fled as the pillar of light shot out into the sky, fleeing from the ravenous light as it stretched out across the Everfree and gave soldiers the chance to chase down the remains of their fleeing foe who took off. Membrane wings spread, some fled on two legs and charged towards the nearest rivers where boats were hidden, others took off on currents of air with feathered wings beating or horns glowing in hopes that the light would not come for them as it had taken her.
And as she screamed bloody murder, cursed the one she called sister and then cursed the ones she'd called 'friends', the light slammed into the moon, spread across its surface, exploded in the air and bathed the whole world in blinding warmth.
All while one Princess was joined by several unseen figures that stood beside her. Watching one of their own serve a sentence they'd hoped would never come.