Sombra was in horrible pain every year since childhood, then he was disembodied by the Princesses, then blown apart, and now he is resurrected through pain again. To this point he must be insane and very, very angry.
To be fair, King Sombra was violently blown apart and left like that for a year or two. Radiant Hope must be one hell of a cleric/healer to be able to put him back together like that.
“Did someone say my name?”
Oh and dang it Carlos!