ERftLW: Static Shock

Make a ranged spell attack against a creature within range. If the attack hits, the creature takes 1d4 lightning damage and is charged with crackling arcane energy until the spell ends. If the target makes an attack roll before the end of its next turn, it takes lightning damage equal to your spell casting ability modifier. If the attack hits, the damage the spell inflicts is reduced by an amount equal to the lightning damage dealt by this spell.
At 5th level, the lightning damage from the ranged spell attack increases by 1d4. Additionally, the lightning damage increases by a 1d4 at 11th and 17th level.