I don't know what all I've got to say on this one, admittedly. Most of what jumps out is firmly in duh territory.
For what it's worth, yeah, I did look up typical temperatures for an ice skating rink and the typical thickness of them for this page. That bares mentioning I guess.
I'm admittedly not really that happy with how the silhouette in the first couple of panels came out. I was wanting that deep in the background, while here it looks like even with Misty distracted from sensing it, her and Sareena still really should see it.
Then again, if it's not obvious from the third panel, there are some supernatural forces at work there.
Hm. Yeah, that should've been behind the rink-gate or something. Hm.... Either way, the temperature thing does make me kinda annoyed people weren't wearing longer clothes or something on the ice; it just didn't occur to me. Heh... We could've seen Laura's teddy-bear sweater again.
Did like the final panel, though. Was a really cool effect. ^^ It kinda feels like a Mario boss. Appropriate given Misty's a gamer. Heh... That and her hopping over that first wall if very Mario-like. .... There's a fat joke in there somewhere but I generally don't like making those.
In even further retrospect, that hand in the second panel of her arm re-forming could look more like... blobby, like she's just putting it back together. Ah, well.
This is certainly an interesting twist, all kinds of supernatural things are happening here.