Sombra made mistakes. He knew he deserved to be jailed like he was. His actions caused the terror and enslavement of an enitre race. He closed his eyes, straining to look back at the past.
He wished he had never been born. He wished he had been born different, at least. He thought, if he had been born normal, flourescent pink or blue, with a brightly colored mane and light eyes, he would have fit in. He would have sparkled like the rest of his peers in the warmth of the Crystal Heart's love.
He would have never had weaker magic if he had been born normal. Maybe then, he would have never wandered into the Library of the Crystal Empire Mage, scouring the shelves to find any book that would help his young horn grow and become more powerful. He never would have met the Mage himself and never would have latched onto the father-figure he saw in him with such vigor. Maybe then, the Mage never would have handed him the book about dark magic and led Sombra to the day he could only stand by and watch as the older stallion enslaved the entirety of the Crystal Empire.
Maybe that never would have happened. He wished he had been born different.
"I like you just the way you are." Luna whispered through the bars of the cell.
"Only you, Moonbeam." Sombra sighed back wistfully.
Sarah and I ignore the last season btw cause it wasn't the best and we didn't like a lot of it. Not that it wasn't cool to watch! But we just didn't agree with a lot of it.
If you can't tell, our headcanon of Sombra is different than in the show. Sombra was dark colored in a world full of bright colored ponies and he had weaker magic than all of his peers. He was seen as an outcast. An orphaned, weak, pitiful outcast. Sombra went into the Mage's Library one day (the library we see Sunburst in when he reunites with Starlight) and searches and scours for a book to help strengthen his magic. The Mage sees him and leads him in the direction of dark magic, taking the young unicorn under his metaphorical wing and teaching him all he knew. Together (along with the dark magic corrupting Sombra's mind the same way the Tantabus had with Luna) they could take over the Crystal Empire. Before Sombra could realize what was going on, it was too late and he was forced to watch his people lose what they loved most: each other.
Sombra is terrified. In his terror, he kills his mentor in a heartened attempt to save the Crystal Empire. But it's too late. The dark magic has come too far, though, and takes over his mind, turning him into an evil being. Now left to lead the Crystal Empire alone, he follows in the footsteps of his mentor and forces the Crystal Ponies into slavery.
He is defeated by Celestia and Luna, seeming to disappear, but no. He comes back (in Season 3), the darkness even stronger, but when the light of the Crystal Heart's love hits him instead of the power of the Elements of Harmony, the darkness is banished from his heart and horn. This causes his body to dispel of all evil, turning back into his old self. He is shocked at what he has done and breaks down, apologizing to the princesses. He still must be jailed, though, and he understands, allowing himself to be locked in Tartarus, playing ball with Cerberus in his free time.
Cerberus could tell he wasn't truly evil.
Luna, who had been shocked alone by the confession of his story, so similar to her own (the darkness took over my body and I lost control), found herself intrigued by the stallion. She begins sending letters to him, asking him simple things like his favorite ice cream and his favorite color. They get into deeper things, like both of their intentions and what they feel they did wrong and what they would have done.
In the end, Luna ends up visiting him many times, even freeing him for trips to Canterlot, in hopes of reformation. During one of those trips, Luna becomes pregnant with Constellation.
After Constellation is born, Celestia sees he is truly good and releases him on promise of reformation and good intetnions.
Blackout was born within that time.
Within the time Luna is pregnant with Blackout, rumors of dark magic being used in cities in Equestria spreads to Canterlot. Who do you think the ponies of Equestria first assume is doing it?
Sombra is forced on the run. To this day, Luna has no clue where he is. All she knows is that he is safe and alive.
