I'm just afraid we're going to walk into the lair of an ancient white dragon or something. Or just have the thing freeze down around us. It just feels like shmuck bait to me at this stage, at least if we're going to walk in blindly.
I think SirP would give us more of a warning before he TPK'd us. Maybe that's metagaming too much, but still...
Q&A:
1. Can you figure out what's causing the effect? Yes, with some good rolls.
2. Can you get to it/get it? Yes, with some ingenuity, though it's dangerous at this level.
3. Is it cool? Yes.
4. Is it necessary? Not right now.
5. Will it still be here when you get back? Given that no one else knows about this place, and the ice keeps pretty much everything out that isn't actively trying to get in (and has the resources to do it)... probably.