Chilling Shroud

You mark a creature with a chilling aura, slowing those who are near it. Make a Ranged Spell Attack against a creature within range, on a hit you do 1d8 cold damage and the creature is shrouded in a chilling mist. The target and each creature within 10ft of it have their movement speed halved for as long as you concentrate on the spell, at the end of the minute or if you lose concentration the shroud fades and the spell ends.

At Higher Levels: When you cast this spell with a 3rd level spell slot or higher, the damage increases by 1d8 for every slot level above 2nd. Additionally, When you cast this spell using a 4th level spell slot or higher each creature within the 10ft radius has their movement reduced by 10ft while this spell is in effect.