White-Ice Blade

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within 5 feet of you. As you do, white ice covers your weapon and emits a blue frost that covers the ground in a 5-foot radius, centered on you, that last until the start of your next turn. Moving causes this area to move with you. On a hit, the target suffers the weapon attack’s normal effects. Any enemy that ends its turn in the area of effect takes 1d4 cold damage.

This spell’s damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d4 cold damage to the target on a hit, and the cold damage to the second creature increases to 1d4 + your spellcasting ability modifier. Both damage rolls increase by 1d4 at 11th level (2d4 and 2d4) and 17th level (3d4 and 3d4).