Biting Blast

A beam of Freezing cold energy streaks toward a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d8 cold damage, and its speed is reduced by 5 feet until the start of your next turn. this effect stacks with each consecutive hit. 

The spell creates more than one beam when you reach higher levels: two beams at 5th level, three beams at 11th level, and four beams at 17th level. You can direct the beams at the same target or at different ones. Make a separate attack roll for each beam.