(the image is AI, do not know if that is ok, will remove if need to)

So the warlock (level 6) in my game had gathered metal from some constructs that had thunder damaging abilities and asked to have them made into a weapon, preferably a punching weapon. This is what I got, any advice is appreciated

Thunder Dusters Simple weapon (attunement)

While wearing these knuckle duster gloves they make your unarmed strikes count as magical while adding a 1d6 thunder damage in addition to your bludgeoning strength modifier. While wearing the gloves you have disadvantage when using any other weapon (you can wear one glove and use another weapon in the non glove hand).

While attuned to the gloves, as an action, you can make two punches. Alternatively as an action you can cast the Booming Blade cantrip with the glove as the weapon material for the spell, which is treated as if it's cast at level five. If you have the booming blade cantrip already learned you can use the gloves as the material component and add an additional 1d8 thunder damage to the attacking damage. You also have two charges that recharge at dawn. You can use these charges to cast the following spells for one charge once per turn Thunderous Smite Thunderwave (requires both gloves to use this)