We could try. I'll go to random.org and grab a number, then add 1 for being above average, and if its above 15/20, it'll be stable enough to make crysteel in(though you'll need an actual normal pot to actually make stuff out of it, the ice will cool it down as soon as its formed; also, the less you need to do with it, the lower the requirement will be for stability) Either way, I'll give you guys some Cryo exp for each try.
So...
You decide to be even cheaper and make your own pot out of ice. First though, you'll need more humidity. So, you grab the tongs and fling the pyroagent into the fireplace to make it more summery. *WHOOSH!*
Having gotten enough humidity to keep the room not-totally-out of water vapor, you make the pot, and try to make it strong enough to make some crysteel. It seems just good enough.
you decide to test it with a plant test.you put a plate near the fire, then put it in the pot and put the last living plant on the warm-ish plate, followed by a mutagen and a cryoagent. you chant what you think is the combination magic, and the plant turns into some kind of weird plant colored ice thing that grows when near cold. Satified, you make 12 or so more cryoagents, dump about 10 scrap in, then do what you did before to freeze the fireplace. You drop that in too, drill holes into the Ice Pot to bolt the lid onto, do so, and crush the frozen fire. the pot makes a ton of steam sounds, and turns the lid red-hot. then it melts in a huge puff of steam, and a pot-shaped hunk of average quality Crysteel falls on the floor. the crack in the floor cracks again from the thud. You really should get that fixed soon.
14 +1. quite lucky, you guys are.
-10 scrap, +9 Crysteel (pot was just barely strong enough to let it cool correctly, you had to freeze and shatter one unusable section.)
+.15 Cryomancy (Rank 5.25)