Snegleta Snegurochka

is the Noble Phantasm of Anastasia & Viy in their swimsuit. 
Although Snegurochka is a snow maiden of Russian folklore, she is in no way connected to this Noble Phantasm. It uses Viy's Mystic Eyes to temporarily invert the seasons, then catapults the incredible energy generated by that very inversion at the target. It's beautiful to see, but you really wouldn't want to be on the business end of this attack.
==References==
Category:B rank Noble Phantasms
Category:anti-Unit Noble Phantasms
Category:Noble Phantasms
Category:Noble Phantasms introduced in Fate/Grand Order
Category:Noble Phantasms of Anastasia