Valin's Charged Slash

As part of the action used to cast this spell, you must make a melee attack with a bladed weapon against one creature within 5ft., otherwise the spell fails.

On hit, the target suffers the attack's normal effects, and suffers an additional 1d6 lightning damage as your weapon releases a charge of lightning. Additionally, any creature in a 15-foot cone originating from the caster and centered in the direction of the target makes a Dexterity saving throw. A creature takes 2d6 lightning damage on a failed save, or half as much on a success.

At Higher Levels.When you cast this spell using a spell slot of 2nd level or higher, all damage increases by 1d6 for each slot level above 1st.