Charged 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 attack’s normal effects, and it becomes positively charged until the start of your next turn. If the target ends its turn within the spell's range, it immediately takes 1d8 lightning damage as the electrostatic discharge arcs off your weapon, and the spell ends. If the target takes lightning damage from this spell, it can't take reactions until the start of its 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, and the damage the target takes for being within the spell's range increases to 2d8. Both damage rolls increase by 1d8 at 11th level (2d8 and 3d8) and again at 17th level (3d8 and 4d8).