["I've never been an arts kind of guy"... Gnosis resists the urge to sigh. Yeah, it might not actually be doable to teach Vash what is ostensibly magic under another name, but they can try that later.

Vash looks confident. That's good, that's a sign that this will go—

Fantastically awful. Yep, should've known.]

Slippery, isn't it? [He remarks sympathetically — Gnosis is from a country that's basically winter all year round, but don't worry buddy, he often slipped when he was four years old! ...which isn't going to help Vash to hear, so he bites his tongue.] Gravity both is and isn't your friend on the ice.

[He flicks his wrist, and the ice underneath Vash shifts until it forms something of a half-wall, or even a railing, on either side of him. It'll scoop him up under the arms as it grows.]

Use that to try to regain your balance and find your footing again. I'm unable to help you up otherwise, but I can do this much.