Board Thread:Theories and Speculation/@comment-25122992-20170307224943/@comment-9782468-20170308171254

Microscopic level was due to the Wind Release sharpening itself, I don't think it's an effect of adding any Nature Release to it. But here are my guesses on the other Nature Releases.

Lightning: Uses Lightning to shoot the Rasengan, similar to Kakashi's Lightning Dog technique. Rasengan drills through anything it touches, since it has the power of a Rasengan with the cutting vibrations of Lightning Release. Even a graze will paralyze you due to electricity.

Fire: Ball version of a lightsaber, really. Just a glowing piece of fiery chakra, that cauterizes its wounds as it goes. Also, you can throw it, but it loses its form the further it goes. So larger area of effect as it goes out, but less intensity as well. Remember that a Rasengan exploding has a lot of force by itself, so Fire added would be pretty good.

Water: Basically Rasengan on steroids. The Rasengan just uses chakra to wear away and erode at the target. Well, water does this is nature on its own. So add Water to a Rasengan and there's nothing it won't decimate.

Earth: Acts like a Rasengan in essence. You can use it to drill through things. But when you hit an opponent and let it go off, the rocks fly out and hit with the force of a bomb, leaving the opponent torn to pieces.

My take on Nature Release Rasengan