Suggestion - Priest of Rymrgand

I was attempting to make a Pale Elf Mystic (Cipher/Priest), since Pale Elves come from The White that Wends, and their culture also has the option of Mystic... it seemed to be a really tight knit concept expect for an oversight, Pale Elves typically worship  Rymrgand Beast of Winter, God of Cold, Death, Winter, Famine, Entropy, Bad Luck etc, but clearly there is no Priest subclass for this god at the moment, I was thinking Ice damage/Debuff theme, likely from the mage tree of spells, with a favored weapon that also does ice damage (I'm thinking two handed Axe for the true executioner's vibe, or some sort of spear for their winter beast theme)