I'm not the first person to observe that magical girls are literally a brighter and more vibrant version of their ordinary selves, but I like this particular Memoria from Magia Record, "Girl's Boundary" ("That Which Divides" in the North American server) not only because it shows this juxtaposition directly, but because it also makes the subtext explicitly text:
There is a vast gap between ordinary girls and Magical Girls. An invisible but tremendous gap. However, armed with their "feelings" and "wishes" they can cross that gap in a single step.
There's a tendency to focus on the downsides of contracting--and for good reason--but I think that it's also important to focus on the very real appeal (especially for adolescents) of stepping out of your boring everyday life and becoming an idealized and powerful version of yourself, complete with ruffles and sparkles. (The sparkles in this drawing indicate that this is 2-star Memoria, and probably were not meant to be Magical Girl Madoka is sparkling, but wow, does it sure look like it at first glance.) It's such a powerful fantasy, and this card does such a great job of depicting that, and showing what it's like for it to come true.
The use of "boundary," 境界 (kyoukai) here is interesting to me in contrast to the kekkai, 結界, or magical barrier created by witches (translated as "labyrinth" in the official English version). Becoming a witch is literally being bounded, circumscribed, limited in possibilities; instead of being able to transform back and forth, they are fundamentally stuck in a monstrous and inhuman form for eternity. A witch is neither a magical nor an ordinary girl but a secret third thing, reviled and trapped in their own personal hell, existing in a liminal space that is anathema to the world around it (represented by the change in animation). Magical girls, however, have the freedom to cross over at will because their feeling and wishes give them strength and power to do so.
This card's text also reinforces the idea that magical girls literally exist in a different world that ordinary people cannot experience. In the original series, this gap serves to isolate and alienate them from their previous existence and ensure there is no turning back (and Madoka and Sayaka do not even have to contract to experience this for themselves; just being introduced to that world is enough).
However, the act of becoming a magical girl--both the original contract and the transformation--is, like electrons, fundamentally quantum in nature: it allows them to instantly* jump from world to world without passing through any points in between. Which makes sense in a weird sort of way, since "feelings" and "wishes" are literally energy, and the transformation of soul gem to grief seed comes with a powerful explosion reminiscent of nuclear fission.
(*Many arguments have been made about how long magical girl transformations actually take in-universe and whether the slow montages are experienced by the girls and/or observers or are only a representation for the audience; YMMV, but on several occasions we see magical girls in PMMM transform instantly without an extended sequence, which makes the latter seem more likely.)
Speaking of transformation sequences, this card evokes Madoka's in the opening of the PMMM, where she dances with her double. More poignantly, it also speaks to Madoka's profound self-worth issues, where she feels she is useless in her ordinary life and can only find fulfillment as a magical girl.
Finally, I have a lot of questions about that magic circle design in the upper right corner, and I wish more of it was visible in the background.
