"Hmm" you heard Cirno's musings coming from above, the girl thinking intensely of what else to do with her new possession. Gods only know how long she'd be standing there were it not for a literal flash of inspiration.
KA~BOOOM
Both of your eyes turned upwards, as certain ordinary magician blasted through the sky on her trusty broom, leaving destructive, rainbow beams of light in her wake. The ice fairy tried very hard not to appear impressed by the spectacular light show, though through her foot you could feel he body shaking in amazement.
Surprisingly, the sight of that witch managed to jog some memories in that icy cube Cirno has for a brain. The fairy patted at the sides of her skirt for a bit, before triumphantly reaching into one of her pockets (she had pockets?), and pulling out what appeared to some sort of a vial, filled to the brim with blue, luminescent liquid.
"Hah, I almost forgot about this potion I nabbed from that dumb witch. Now I can finally see what it does." She said while looking down at you, with a sinister grin on her face.
Acting on instinct you clenched your mouth as tightly as you could. You clearly wanted nothing to do with the ice fairy's crazy experiment, but Cirno would have none of that. With a firm stomp to your stomach she got a pained yelp out of you, and within the small window of opportunity stuffed her other foot in your mouth, easily keeping it from closing with her mere toes. How strong was that girl!?
Cirno laughed cruelly at the sight of your pathetic struggling, happily wiggling her toes, and getting their foul coating of sweat and grime all over your mouth. Then, if things couldn't get any worse, Cirno carefully bent her upper body forward, and with a wicked grin dumped the vial's content on her domineering leg. You watched in terror as the fluid ran down her leg, then foot, then toes, and finally started dripping onto your tongue. It was surprisingly sweet, and although it collected some of her foot sweat and dirt along the way, it was still an overall improvement in terms of things you got a taste of today.
With the liquid poured into your mouth, the ice fairy stepped down from your body, and now merely stood above you, looking for any signs of the potion's effects. If she were to ask you how you felt from it (which she didn't, because why would she), she'd learn that you didn't feel any different, only a little... what's the word... Tingly?
Oh, ooooh, now you felt a lot more of that. It made you very uncomfortable, so much so that you had to close you eyes in distress. As you did, you could hear that dumb fairy laughing out lout, apparently amused by your misery. Weirdly enough, her voice got more booming, and echoey with each passing moment. Is that how the potion worked?
---
KA~BOOM
Another sudden explosion, probably that witch's doing again, seemed to snap you out of that potion-induced daze. Grabbing your pained head in some futile attempt at relieving it of that migraine, you tried hard at focusing on your surroundings, and locate that dumb ice fairy. Her powers could be of some use to you right about no-
KA~BOOM
Once more that loud noise shook the earth, though this time you were able to tell it wasn't that magician's work. No, it was the sound of something heavy crashing to the ground close by, enough so to push your body away with the resulting shockwave. Now with your whole body bruised, you began to frantically search around the arena for its source, only to almost go mad from revelation once you succeeded.
Cirno was enormous. Gigantic. Larger than any of the largest skyscrapers ever built. The mere bottom of her smallest toe was the size of a football field to you, something you were able to estimate thanks to the giantess holding her foot raised above your, ready to drop you at any moment. From in-between her spread toes you could look her in the eyes, the titanic fairy flashing you a toothy, confident grin as she was somehow able to locate your dust-sized body on the ground. Waving and flexing her foot around caused many of the barely clinging sweatdrops and clumps of dirt to rain down around you, reminding you of those bombardment scenes from war movies. Surrounded by this madness, you've managed to force yourself to do the only thing you were capable of doing now: run away while screaming your lungs out. Unfortunately, your squeaky screams of panic served only to further amuse the cruel fairy, as she carefully moved her foot after you, making sure you would never leave its shadow.
---
What does Cirno do now with your mite-sized body now?