Arctic Arrow

Spell Lists: Sorcerer, warlock, wizard
Evocation cantrip
Casting time: 1 action
Range: Self
Components: S, M (a weapon with the ammunition property worth at least 1 sp)
Duration: 1 round
You ready the weapon used in the spell's casting and make a ranged attack with it against a target you can see within the weapon's range. In place of ammunition, a mote of pure frost energy forms along your weapon as you motion to attack. On a hit, the attack deals cold damage instead of its normal damage type. Additionally, a thin sheath of frost surrounds the target until the end of your next turn.

If the creature takes damage of any type except psychic before the spell ends, the frost shatters, dealing 1d4 cold damage to the target and any creature within 5 feet of it. The spell then ends.

This spell's damage increases when you reach certain levels. At 5th level, the initial attack deals an extra 1d8 cold damage to the target on a hit, and the damage dealt if the sheath of frost shatters increases to 2d4. Both damage rolls increase by one die at 11th level (2d8 and 3d4) and again at 17th level (3d8 and 4d4).