Frost-Bolt Barrage

Fire a storm of bolts Each creature in a 10ft must make a Dexterity saving throw. On a failed save, a creature takes 3d6 cold damage and is restrained as the icy shards impede their movement. On a successful save, a creature takes half as much damage and isn't restrained.
Your crossbow attacks gain the following benefits:
Your crossbow's damage increases by 1d8 force damage.
You can make one additional attack