Board Thread:Theories and Speculation/@comment-1512913-20161115123051/@comment-1512913-20161115142604

For Magnet, it's an invisible force, no substance is produced. Earth and combined natures that are part Earth tend to be substances.

Wind is also an invisible force, motion and its pressure of gases in the air. In terms of chakra, Wind chakra is chakra that's grinded against itself to make it very thin and sharp, like very tiny needles.

Magnet seems to be affecting mostly metallic substances, so Lightning would be presumed to be included.