Board Thread:Theories and Speculation/@comment-1512913-20161115123051/@comment-1512913-20161119160615

The only confirmed natures Deidara can use are Earth and Explosion. Nowhere in the manga or databooks does it say that he can use Lightning or that the Explosion is Earth + Lightning, that's 100% assumption being passed around as fact.

For Rasa, yes, from the natures that 4th databook revealed for him, Magnet can be made up of only Wind and Earth, but the databook is filled with errors all over. So while Earth + Lightning = Explosion is false, completely made up by people here who only assume it to be true, Magnet being Wind + Earth has at least basis in a databook.

Magnet being Earth + Wind is 50/50. It's true if a mistake wasn't made in Rasa's profile, if a mistake was made, then it may not be true.