It's been said that whole flocks of these work together to cover entire regions with frost from their cannon arms, effectively forming new habitats for other ice beasts.In-game description
The Iceprite is the Stage 3 magic form of the Ice group.
Icesprites were removed from the game before it was released, so although their data still exists, they do not appear anywhere.
A Iceprite should evolve from White Ermine, but it is disabled in the alpha version. It does not evolve further.