This is one of the spells used by Blair. It generates large, floating pumpkins that, among other uses, Blair can use for transportation. The pumpkins move according to her will. The pumpkins can also shoot down like missiles towards the ground, bombarding any opponents below.
Flying Pumpkins, as a spell, seems most useful for utility purposes. Blair, whilst hosting a party with Risa and Arisa in the Death Room, summoned smaller pumpkins that exploded into confetti, which may mean that Blair sometimes uses the Flying Pumpkins merely for show.