Thunderous Strike

You channel the power of the storm into your weapon, causing it to crackle with lightning. Make a melee weapon attack against a target within range. On a hit, the target takes 1d8 lightning damage. If the target is wearing metal armor, they have disadvantage on the saving throw.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.