[quote=@LeeRoy]
I feel like Anna's snowball potential increases with the quantity of water that she's around, until she eventually becomes unstoppable. Which is problematic, to say the least. Especially since, in character, I can't do anything about it.
[/quote]

In theory, yeah, she's almost unstoppable if you put her in the Ocean, it's worth bearing in mind her attacks become more sluggish and less agile when she has more water to work with though. Though far more devastating when she does unleash them.