As my sister rose the moon, we looked up at the sky, thinking about what had become of our family. When these foals showed up, I was 19. The only thing that kept me going was, "I've got to stay strong. Do it for Cosmo, for Crystal and Rose, for Equestria." I would tell myself this every time I was about to lose hope. Crystal Jewel, and Primrose, my cousins, weren't alicorns. Primrose, a regal young pegasus, was much like her ascendants. Her grandmother, was a pegasus with eternal life, until Sombra expelled the crystal heart from her body. Crystal was a poised unicorn mare, who's power commonly caught her by surprise, as she had little control of her magic, equivalent of an alicorn's. The twins shared a portion of the Crystal Heart's magic as their source of eternal life. When Cadence became one with the Crystal Heart 9 months ago, she rid Sombra's spell from her body, and became empowered by it. Cadence had been the one to bring the infants to our home, and stayed with us. When she uses her empowerment, her wing gradients change from purple to blue, and her horn gains a golden gradient. The twins were born crystal ponies because of this.
Our aunt, now reunited with her husband and brother in law, brought Twilight's son to safety. These foals were Sombra's, but, the sisters, in the corruption, had no say in what Sombra did. After all, he was controlling them. Shining didn't mind, and raised the twins as he did his own daughter. Princess Mi Amore Treble Aria Sparkle, was the only alicorn descendant of my aunt, and the only descendant of both my aunt and uncle. She was the eldest descendant of Cadence and Shining Armor, as the royal couple kept it a secret that Prim and Crystal were Sombra's daughters. The only other ponies who know of this are Starry, Cressie, Treble, and yours truly. Prim and Crystal didn't even know their true father, which in this case, wasn't such a bad thing.
As for my mother, she and Sombra were plotting an attack on our newly established empire. "My sister has escaped, with the Crystal Heart and our prince. We must get revenge." Midnight stated. "Don't you worry, my queen. We'll get to them soon enough. Sombra replied. The two had a master plan of every possible move they could make on us. Little did any of us know, Starry and I were born with a magical gift that would change Equestria forever.
20 years ago….
"We need to think about Equestria's future, Luna. We're doing this to keep Tierk and Sombra from our magic. They'll never figure that it's been transferred in this way." Celestia told her sister. "I suppose they won't think that two foals have our magic." Luna replied. "So, we have an agreement?" Celestia replied. "Yes sister. This is for the benefit of our subjects." Two fillies, my sister and I, were created and sent to The Castle of the Two Sisters. Twilight soon found us, my sister showing a close resemblance to Luna, and I to Celestia. She got the letter a short while later, and disguised herself as a peasant unicorn with her twin daughters. She disguised us to look like her descendants, two unicorns. She used a new name and cutie mark as a cover. My 'mother' went by Violet Bloom. She claimed she'd been widowed and was caring for her twin daughters in the forest. Tierk and Sombra, after royal magic, bought it and moved on.
Present…
"That's how we've been safe for 19 years?" My sister asked. "Yes. You'll return to your true forms after you defeat Sombra." Cadence replied. Our names were Princesses Sunlight and Moonshine. Mine was at least similar to what it truly was, my sister's was completely different. He wouldn't suspect us, as we still looked like unicorns at this point in time. We didn't know what to think. What if our 'mother' and Cadence had to do this? Luckily, Cadence mentioned she didn't remember us when she was in corruption mode, meaning our mother wouldn't remember the gift we were born with, leaving us with the perfect mechanism of defence.