Hoarfrost

A melee weapon you are holding is imbued with cold. For the duration, a rime of frost covers the weapon and light vapor rises from it if the temperature is above freezing. The weapon becomes magical and deals an extra 1d4 cold damage on a successful hit. The spell ends after 1 minute, or earlier if you make a successful attack with the weapon or let go of it.

At Higher Levels. The spell’s damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).