Wondrous item, rare
It takes 1 minute to don or doff these sabatons. While wearing them, when you move at least 20 feet in a straight line toward a target and then immediately hit it with a melee attack using a weapon or an unarmed strike, the target takes an extra 1d6 lightning damage from the attack. If you move at least 30 feet in a straight line towards the target instead, the lightning damage is increased to 1d8. In either case, if the target of the attack is made of metal or is wearing metal armor, you have advantage on the attack roll.
Charge!