I think this one looks like a snowy winter night.
Snowy Winter Night - Misa Dance Fever sponged over China Glaze Little Drummer Boy
I've never been too successful with sponging, but I think it all depends on what kind of polish you use for it. This glitter, Misa Dance Fever, was the perfect density for the sponging and it was actually pretty quick and easy! Also, I've heard that this type of gradient has a killer cleanup, so I put Liquid Palisade around my cuticles. I basically had NO cleaup at all! It worked so well! I've never been able to create neat design using Palisade, but it does seem perfect for avoiding cuticle cleanup from messy types of manicures (if I ever try water marbling or splattering, I will SURELY use this again!).
I topped it all off with China Glaze Fast Foward top coat, which has some shrinkage issues like Seche Vite, so that's why the blue shows around the cuticle edge and there's a bit of shrinkage at the tips.
I love this and want to try in in different colors now! I think a glossy black base with gold glitter would look really classy!