With natsu's heat sensing, he can feel where anyone is on the field, he knows that you make a clone as he can feel a new body heat on the field and feels the orignal body heat go underground. As the real you goes underground, natsu blows up the carbon behind your clone, it wouldn't be a big blast just enough to kill the clone with:No, just to form a window to get into a better style of combat, old man.
Due to Natsu transforming into wind as he sees the Chidori approaching, Law would indeed see the transformation, as the storm would have reached enough scale to block out what he sees as of yet. As the storm passes over Natsu, and thus hindering his own vision of Law as well, Law creates a Shadow Clone and merges with the ground, not making a sound as he does so, leaving the clone up above to pose as him. The carbon forms on the clone instead and Law travels underground, going 20 meters deep(beyond the scope of the Sharingan's vision),then traveling up to where Natsu is, going to ten meters below him(still out of the Sharingan's scope).
(Kage Bunshin no Jutsu) - Shadow Clone Technique
Rank:B
Type:Supplementary
Range:Short
Chakra Cost:20
Damage Points:N/A
Description: The Kage Bunshin distributes the ninja's chakra evenly among the clones and creates a real copy with form and substance. The clone itself can also utilize any jutsu the original ninja knows. When the clone finally disperses, any new knowledge it has gained is passed back to the original ninja and any additional clones. Upon impact, the clone can be dispersed.
(Hiru Banshō: Bōka no Jutsu) - Leech All Creation: Attack Prevention Technique
Rank: B
Type: Supplementary
Range: Short-Long
Chakra cost: 20 (-5 per turn)
Damage points: N/A
Description: Using this jutsu, the user can merge with another passive object and take on its properties to avoid any damage. While merged, the user is virtually undetected unless the enemy has a doujutsu. Even chakra sensors won't be able to pinpoint the users position. The limitation of the technique is that to use a technique and mold chakra, the user must fully unmerge although doing so doesn't produce any sound and the user can only be sensed once fully unmerged. The user is still aware of the world outside the object and can travel inside it at his normal running speed. The technique was used so far by 3 ninjas (Yamato, Orochimaru and Uchiha Madara) but as an advanced ninjutsu, it can be used by any skilled enough ninja.
Note: the user must be Sannin Rank and above
Note: Orochimaru and Yamato can use it 5 times per battle, Uchiha Madara can use it 3 times, other ninjas can use it twice.
Note: Cannot merge into mediums which aren't tangible
(kurokongouseki bakuhatsu) Carbon Detonation
Rank: S
Type: Attack
Range: All
Chakra Cost: 40
Damage Points: 80
Description: The user will focus their chakra into any source of carbon they have created or have taken control of with previous carbon techniques, making all the particles come closer to eachother making the carbon denser and mroe and more pressurized until it reaches zero point, when it's as dense as it can be. Then unleashing their chakra in that carbon source, the carbon will explode, all particles will move away from eachother creating a very strong blast. The carbon will still be there, just shattered into dust.
Note: Useable twice
Note: No S ranks in the same turn
Note: Hurts the user if caught in blast
Note: Only works on carbon the user has created or has control of
This happens while you're traveling under natsu, he knows your there, but you don't know he knows that, good old heat sensing. As you reach his destination he covers the entire field with carbon:
(kurokongouseki ryouiki ) Carbon field
Rank: B
Type: Supplementary
Range: short - long
Chakra Cost: 30
Damage Points: N/a
Description: The user will perform 2 handseals releasing there chakra into the surrounding area to cause carbon in the earth and other sources that are not living to rise to the surface, making it so their is a layer of carbon over everything on the battle feild. This can be used by a carbon user as a carbon source for certain jutsu.
Note: Useable twice.
Note: Can only draw carbon from none living things
You can't pass through this as its carbon not earth and its all my charka, so your stuck fused with the earth