you draw the bow and use the spells casting and make a ranged attack with it against a target you can see within the weapon's range. instead of ammunition an arrow of pure frost energy forms along your bow. on a hit the attack deals cold damage instead of piercing. additionally, a thin sheathe of frost surrounds the target until the end of your next turn. A creature immune to cold damage is not sheathed in frost.
Of the creatures takes at least 10 damage not frost or psychic from a single effect before the spell ends the frost shatters sealing cold damage equal to your spellcasting ability modifer to the target and any creature within 5 ft of it this ends the spell. the spell adds damage to the initial attack when you reach certain levels. at 5th its 1d8 cold extra with another 1s8 at 11th and another at 17th.