If you realy would like to use freeze but you're not a mage take the folling steps:
-Train blacksmithing to level 3
-Gather the ingredients for two 'Mage's rings/Ring of the Mage' (forgot how is was called).
-Make the two rings, they both give two levels of crystal magic each.
-Equip them and your warrior can use magic crytals as a level 4 mage.
-If you're near the end of the game you should have found a freeze crystal by now.
-Equip the crystal and have fun.

I personaly found it pretty bad in comparison with the other crystals.
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Easy Vape Review