
Umbral Reaver |

Your GM is the one you want to ask the question of, "Can I do X for flavor/fun/etc." Your mileage may vary.
One time I saw someone allowed to bend the rules for fun, they drew out the consequences of that 'fun' to construct a devastating weapon... out of a particular quirk of a cleaning spell (non-d20).
It all started with... "It doesn't get rid of dirt. It just moves it to the edge of the cleaned surface, right?"

artificer |

One time I saw someone allowed to bend the rules for fun, they drew out the consequences of that 'fun' to construct a devastating weapon... out of a particular quirk of a cleaning spell (non-d20).It all started with... "It doesn't get rid of dirt. It just moves it to the edge of the cleaned surface, right?"
Well, Wizards are smart guys so is not unexpected that one will find new applications for old spells :)

Cheapy |

RAW, no. It's an evocation [cold] spell, and those don't last long enough to have lasting effects unless the spell says so.
Acid Splash *can* be used for these sorts of things though. It's conjuration (creation) [acid]. It's real acid. And it disappears after a round. but still...
But yea, ask your GM. Ray of Frost seems fine for that.

Torchbearer |
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We usually allow cantrips to work for fun stuff like that. General rule at our table is if you're not trying to twist it into some kind of mechanical advantage, it's fine. Take it too far and you can expect to be pelted with large books, so be careful:) As always, talk to your GM for his take on it.