[Elsa laughs and curtseys as well. And, a few feet away, Snowball pops out of the little snowdrift she and the others have been playing in, and squeaks excitedly, running up to the Froslass]

What you have there is a Froslass. [She motions towards Snowball.] When these creatures are exposed to a certain kind of stone, they'll evolve into one like your friend here.