What would of happened if star-swirl's unfinished spell was actually a spell to transport some-pony to one of the planes of the multiverse

The shadow crusade has begun. While the dragon marines reel from discord's suprise attack on calth, Twilight leads the rest of the elements of the word deep into the realm of dragomar. Their unlikely allies, gilda and the griffons of rage,

the iron warriors lead by twilight sparkle lay siege to equestria