[Q] Make a Grief-mechanical-chibi-giant-Sabrina-robot (normal Sabrina sized, actually) for Chibi Mami to pilot.
At that point, you might as well go all the damn way and pull a Tengan Toppa Gurren Lagann.
__________
No one knows exactly how the minds of Witches work, but if Walpurgisnacht is capable of feeling any sort of emotion at all, it would be hopelessly confused. It has seen a lot of things in its time, but it has never before fought a magical girl
larger than itself, and one capable of commanding Walpurgisnacht's full attention.
Countless musket rounds the size of apartment blocks tear chunks from Walpurgisnacht's dress, Grief ripping away from its body like it has a mind of its own. The conglomerate-type Witch cannot even afford to attack the veritable army of normal-sized puella magi facing it down, leaving them free to harry its flanks, chipping it down bit by bit. Muskets spent, the giant magical girl commits herself to an attack run, glowing ribbons whipping around her arms-
Finally, an opening. Walpurgisnacht laughs madly as it sends a building hurtling straight at the gigantic magical girl. The broken skyscraper slams into the golden, drill-haired titan with enough force to check her momentum, steel girders impaling her right through the corset. As the gigantic Mami falls away, her head and upper body simply unravel into a veritable storm of ribbons, revealing-
"
Homura! Go-!"
- another magical girl, this one the size of an apartment building. Black hair streaming behind her, the giant leaps free from her unraveling shell and opens up with a monstrously scaled-up assault rifle. Walpurgisnacht nearly disintegrates under the gunfire, pitch-black Grief streaming from its wounds. Still laughing, still hurtling forward, a burst of magic lances from its gaping mouth and immolates the giant magical girl-
"
Sabrina. I leave the rest to you."
- and yet
another puella magi bursts from the flaming wreckage, a white-haired girl almost invisible within the chaos, if not for the wings of pure corruption streaming from her back. Walpurgisnacht jerks as Grief is torn from its body, nearly destroying its physical form; with its final breath, an army of giggling, corrupted silhouettes arrow toward its normal-sized opponent. Just before she's swarmed, the puella magi grabs something off her head and hurls it straight through-
"Goooooo!"
Even as the tiny chibi-Mami is ripped to shreds by the sheer pressure of the Grief pulsing out from Walpurgisnacht, equally tiny ribbons wrap around its arms and form into an elaborately filligreed cannon.
As incandescent light fills its world, the very last thing Walpurgisnacht hears is an absolutely adorable squeak.
"Tiroooo! Finaaaaaleeee!"
