Delsin's Permafrost

you reach out your hand and magically blast all the heat from s creatures  body leaving them in a perfectly preserved state of  frozen terror.

target creature within range must make a Constitution saving throw, on a failed save the creature takes 12d8 cold damage and becomes petrified for 2d6 days, this condition can end early if the creature takes any amount of magical fire damage. on a success a creature take half damage and is not petrified