Arloth's Frozen Scythe

You create a floating, icy scythe that glows, producing dim light for 5ft and lasts for the duration. The scythe appears within range in a space of your choice, and you can immediately make one melee spell attack against one creature within 10 feet of the scythe. On a hit, the target takes Cold damage equal to 5d4 plus your spellcasting ability modifier. You can repeat this attack and move the scythe 30ft as a bonus action on each of your turns. A creature's speed is reduced by 10ft until the start of your next turn if it is struck by the scythe.