OMG....That was awesome...That absolutely made my day!
And now I think we have developed the official "canon" spell incantation thanks to my new friends, The__Dividender and The_Witch_Aryllia!!!
Incantation: Bellus Militis Cultus
Wand Movement:A curved swish to the left, then a curved swish to the right, almost forming a crescent moon, followed by a flick to activate the spell.
Spell Effect: Basically, the spell will change their clothes to magical girl clothes, and their wand to some sort of magical girl weapon. How the clothes and weapon appear depends upon the focus and will of the caster.