MLP Tarot — The Emperor
Sombra well represent the emperor, in the upright position the card describes authority, fatherliness, regulation, and organization. As we see through the alternative world, he can be a kind and fair ruler with his people's best interest in mind. He guides his kingdom towards happiness and deals with problems in a strategic mind for the greater good of the kingdom. In this, he represents how to deal with problems or challenges that may come before you.
In the reverse, we see Sombra more as he was in the show, an abuse of authoritative power. His desire to inspire higher principles in his kingdom have turned to ruthlessness, tyranny and rigidity and instead of propelling his people forward he seeks only to maintain his control through any and all means necessary. It often in life represents a possessive partner, power-abusing boss, or even when you lose control of a situation and avoid the responsibility of the tasks in your life.
(This image is heavily based off one of the comic covers for MLP but with mixes of both the good sombra and evil sombra to show the upright and reversed meaning of the emperor card.)