Blasting Ice Crystal

As an action, you shape cones of ice around the feet of one creature within range that work themselves into their bloodstream. The target must make a Dexterity saving throw. On a failure, the target takes 1d8 cold damage and their movement speed drops to 0. On a success, they take half as much damage. The cones have a combined 5 hit points and 16 AC, freeing the target if it drops to 0 hit points. When the cones take damage from any source other than the target, the target takes twice as much damage.