Board Thread:Theories and Speculation/@comment-27082825-20150116155842/@comment-27082825-20150123164335

Elveonora wrote: Well, then instead of neutral element, let's say just common element, that's the main point of it anyway, the neutral part is there just to reduce the number of possible combinations as to not overwhelm us. Both Lava and Magnet use Earth, so imagine it as Onoki holding Earth+Fire (molded into Lava chakra) in his left hand, Earth+Wind (molded into Magnet chakra) in his right hand and when he claps them, Lava and Magnet are molded into Dust.

Railgun, This is the anime-only format of explination that Yamato used, albiet with the basic natures of Wood release.