As stated in the Midnight Sparkle Stained Glass, the image of the Shadowbolts shows how Midnight Sparkle was a creation of their toxic and mean-spirited attitudes. Their failure to show any love or care for their own ostensible teammate created Midnight Sparkle.





Daydream Shimmer, a creation of five wonderful people who helped her out in her hour of need, now offers the same thing to a girl in need.





I think the cracks are significant in that they represent Sci-Twi, having regained a bit of her sanity, slowly breaking away from her toxic environment that brought her to this point. Her face is reluctant and she looks too timid to accept Daydream's kind hand. But even within that forlorn look, their is a sense of desperation and longing. It is no surprise, thus, when Twilight accepts, and she breaks away from her old life for good.