You evoke a large shard of ice from the moisture in the air, and hurl it like an exploding arrow, that can when it strikes a Target.
As you utter the words, your breath plumes in the frigid air. A chill radiates from your heart, spreading to your fingertips. The water in the air heeds your magical command, coalescing in your palm and freezing with a creaking coldsnap. Holding the jagged shard of pure ice, you fling it at your foe—a crystalline missile born of your wintry sorcery.