iron sand conductor

Standing on the top of the streetlights, Mikoto fired numerous lightning spears.
She was using the iron sand to create conductive metallic rods, and there were about
twenty of them floating around her. Looking down at the park from a higher position,
she was like a conductor of an orchestra as she swung her electricity covered right hand.
The surrounding spears fell downwards at a certain area of the park like a thunderstorm.

- Toaru Jihanki no Fanfare