@Delfina
Six times, actually:
>Banished into the darkness by Celestia and Luna a thousand years ago, according to the Season Two opener, part 1.
>Blown up by the Crystal Heart in Season Two opener, part 2.
>Disintegrated by the Mane Six in the Season Nine opener, part 1.
>Disintegrated AGAIN by the Mane Six in the Season Nine opener, part 2.
>Defeated and reformed in the comics (apparently retconned).
>Defeated and imprisoned in the comics (crossover with Transformers, apparently an AU story).
Sombra’s just your go-to punching bag at this point.