Blue-Bolt Blade

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within 5 feet of you. On a hit, the target suffers the weapon attack’s normal effects and the target must make a DC 13 Dexterity saving throw. On a failed save, the target becomes paralyzed until the start of your next turn.

This spell’s damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d8 lightning damage to the target on a hit. The damage rolls increase by 1d8 at 11th level (2d8) and 17th level (3d8).