This sounds overpowered to me. You could easily chain this and use together with Congeal to keep all your opponents creatures frozen for 24/7.
I had a "mass freeze" with my Hero card idea back in the day, but I used a percentage, something like "all creatures have a 40% chance of freezing". Ability to freeze every creature with a 100% probability sounds too strong.
Or maybe you could add it to affect to affect your own creatures as well. That way it'll have a drawback when you use it.
That would help balance the spell a bit more, but if you have a way to generate tons of
quanta, you could potentially have a deck composed entirely of Sapphire Towers, these babies, Congeal/Freeze, Flooding, and Ice Bolt/Ice Lances to damage your opponent. It'd render itself powerless to permanent destroyers (unless you do a
/
duo), but still, with so much creature control, water would be able to lock down anything on the field within seconds.