You mean my wife Tinieblas?
I always hated that bitch. She could never accept that i had more magical power then her.
One day i mixed some ingredients from my Alchemy Laboratory into her wine.
It was so delightful to hear her scream and hear her begging for the mercy of death.
After 20 minutes she rammed a sword into her face and died.
A fitting ending for that bitch.
This would be more plausible if the words were more sophisticated, the language more suave and the profanity cut to a minimum while the mockery made more subtle but no less cutting.
I always figured that Sombra was a descendant of the Crystal Queen. He just violated the rules of succession when he took over, either because of impatience or because another pony was supposed to take the throne.
Incidentally, the Crystal Empire was ruled by a queen, not a princess.