Lightning allows the user to channel electrical energy. This can be used to zap opponents or recharge mechanical units. Overcharging beyond limits causes damage to electronical equipment. This can be combined with water to cause a deadly body of electrified water.
Training: Lightning apprentices train by recharging flat batteries, the trick is to allow the energy to flow into the battery safely and without any charge being wasted. Higher level apprentices can work with auto repair firms to jump-start cars and recharge dead car batteries. Depending on the value of the vehicle, jobs like this can be quite lucrative in terms of payment.