What you don't control, controls you. *insert dark menacing laughter*
Wrath had just gotten home from work and he was dead tired. So he went and took a shower. He washed all the dirt and grime out of his coat and feathers. After about half an hour, he got out and dried off, then went straight to his bed and belly flopped on it. He quickly fell to the exhaustion that wracked his tired limbs. But rather than have dreams like most ponies, his sleeping hours were always filled with a voice telling him to release all the rage he kept tucked away. So imagine his surprise when he saw a bunch of stars surrounding him.
"Wh... Where am I?" He asked out loud from pure shock.
"You are in your Nexus of Truth. The place where no lies may be told," said a voice from behind him causing him to jump.
"Princess Luna!?! I mean, Dark Mistress!" He said, trying his best to kneel before his preferred princess. Her night was so beautiful and peaceful that he felt naturally calmed by it when he awoke from his nightmares every night.
"Dark... Mistress...?" Luna asked, confused by the odd title.
"L-long story... Mistress, why do humble me with your pres-" He stopped and immediately stood and turned around upon sensing a familiar cursed entity nearby. "Six winged serpent..."
"What's wrong? Do you sense something off here?" She asked, perturbed by his sudden change in personality.
He merely nodded and took up a defensive stance, spreading his wings and baring his slightly jagged teeth. He then began to circle Luna facing outward like a guard dog protecting it's master.
"You truly think you can stop the rage that bubbles inside you?" Asked the voice he's heard too many times in his nightmares.
"I know I can, demon! My family tamed you once before, and you shall be tamed once again! No matter how many times you try, I shall always lock you away with my rage!" Wrath shouted at the shadows.
"Your grandfather, oh what was his name? Wrath Beacon? Wrath Bacon? Oh! I know! It was pathetic pony that couldn't control me whatsoever!" The shadows called back taunting him, trying to infuriate him, to make him embrace his locked anger.
"Respecting the dead is one thing none of us Wraths fell for before, Oni. So what would make you-"
"Who doth thy speaketh to, Wrath?" Luna asked, cutting him off, slipping to her ancient tongue in her annoyance.
"My apologies Mistress, but those of us with the cursed name have a demon trapped inside us. You might know it from the times of war as the Six Wings of Brutality," Wrath said, turning his head to look at her with sorrow in his eyes.
Luna gave him a deadpanned look, shook her head and said, "No matter, I came to you for a reason Wrath Blazer. You have been selected for joining a special task force that I-"
"I'll do it. If you have anything to do with it, I'll do it. If you told me to go and fight Timber wolves in Ponyville, I would do so without question. Your word is my law. You hold my respect as your night is perfect, beautiful, and calming, while your sisters day is loud, broken, and ugly," Wrath said, spitting out the last bit out with enough poison to kill an elephant.
Luna blushed slightly at the compliments magnitude and said, "Then you know what the cost of being trapped here is?"
"Yes. I will die in the material plane, but any curses or faults shall travel with me here, right?"
"Yes," Luna said with a nod. "Do you accept these costs? And if so, will you be willing to cause the same pain you felt when your own father died on those around you?"
"I wish not to harm anypony else in the material plane with this curse of mine. So I will pay the price of eternally containing the Six Wings," Wrath said without hesitation, turning around and kneeling once more before Luna.
"Then let it be so," Luna said, her horn glowing, ripping him from his physical body to keep him in the dreamscape eternally...