I think I worked out why King Sombra turned to Dark Magic and became evil. · 11:05am Jun 18th, 2020
I'm re re watching the Season 9 opener and noticed, as Sombra's cloak is flowing out behind him while he's laughing at the mane 6 about the destruction of the Tree of Harmony, he's a Blank Flank.
What if THAT was what made him turn to darkness?
What if he was being teased for it by other ponies so he tried to find a short cut to get one, or sought out power to get back at those who made fun of him, and instead of getting a Cutie Mark, he got power over darkness, shadow, and fears?
..... honestly either that or the comics version makes sense.
5287595
I'm not counting the comics, but thanks
5287613
That's why I said either or.