What's in the past?

This is the prequel to my story sister of love. I will be doing picture of this and if you would like to know the theory I used in the story look to Ink rose. I hope you all like.

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"Cadence?! CADENCE?!" Crystal ran around the castle, looking for her sister. At 3 years old Cadence was a great optimist. She would run around the castle, hiding from everyone except Crystal. "Where is she, she is only making this harder." Crystal had tears in her eyes. "CRYSTAL! IM SCARED!" A light pink pegasus flew into Crystal. Crystal hugged Cadence and looked outside. A light blue bubble surrounded the empire, the world outside was dark and gloomy. "Where's daddy?" A muffled voice said. "He-he's not here anymore sis. He passed onto another world." "Where is that world, can he come back?" Cadence looked up hopefully, but there were tears threatening to come out. "No sis, he isn't coming back for a long time, I'll tell you the story."

King Ruben looked up, sensing dark magic. He teleported without a word to the crystal heart. He nodded to a guard who looked shocked, and blew into a horn. The crystal heart activated, and shortly after a few crystal ponies came out, wanting to see the danger. Again, wordlessly, Ruben flew off, and passed through the shield. He saw it immediately two shadow ponies trying to get to the empire. This was a little shock to him as he knew that they were on the rise. He flew down, beating one of them, but then as he had one pinned, the other pounced, pinning Ruben. Ruben grunted and painfully stood up from the powerful blow. "You will not hurt my kids, my wife, or my family." He cast a powerful spell, knocking the shadows back. The one he had pinned earlier didn't get up, but the other one pounced. They went into hoof-to-hoof combat, Ruben winning. But then a black spear went through Ruben gut, there was pain alright, but no blood. Ruben lay there, mortally wounded and cast one last spell "May this charm allow my wife and my daughters to be encased in crystal, keeping them safe forever." His horn stopped glowing, and a blast from the crystal heart blew the shadows away, along with Ruben's spirit.

"That's why daddy's not coming back, it's because he's dead!" Crystal yelled, waterfall coming down. Cadence had waterfalls as well. Crystal embraced Cadence saying "I will never let shadows consume you, I'm just glad we were able to activate the heart in time to keep the shadows away.

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Fast update I know. I got a review from a guest and I would like to answer it

"I thought Cadence was Luna and Celestia's niece?"

In this universe she is Celestia and Lunas cousin. If you know inkrose's theory it will explain much better than I could if my explication doesn't help you.

Celestia and Luna's parents are like best friends with King Ruben. So it would make sense that Ruben and C and L's dad would think of themselves as brothers, therefore Celestia and Luna would call Crystal and Cadence there cousin. Makes sense? Is not ask any further questions in the reviews section. Even hate reviews are welcome.