Thunder blade

You touch a sword within range and empower with lightning, making the blade crackle with electricity .

When the sword becomes empowered, you make a melee spell attack against a target of your choice within 5 feet of the sword. On a hit, the target takes 1d6 slashing damage and 1d6 lightning damage. The target must then make a saving throw with a DC equal to your Charisma modifier plus your strength modifier.