Choking Shadow

You point at a target and mutter a foul incantation. The targets shadow seems to come alive and grip your target by the throat, attempting to choke them. The target must make a Constitution save against your spell save DC or take 3d6 necrotic damage and be restrained until the end of their next turn. On a successful save, the target takes half damage and is not restrained. For each spell level above 1st level that Choking Shadow is cast, up to 4th level, the caster can target 1 additional creature.