Describe how to do it: Meld your chakra into earth and expel it fro your body; it will take a form whether physical (dirt, stone, etc...), liquid (mud), or gas (sandstorm/dust clouds).
How many hand seals does it have: One or none, as it's just a chakra nature.
Advantages: Good against basic and/or slightly advanced Water techniques.
Disadvantages: Bad against basic and/or advanced Lightning techniques.
Combos and possible uses: I'm not really sure how it could be used in a combo unless it leads into another, however this technique doesn't fit into many scenarios and you'd be much better off using something stronger. It can be used to block D-rank water techniques and some of the weaker C-rank water techniques.
How to defend against it: Any lightning technique will suffice, and dodging it is a cinch.
Image of the technique: (not sure what this means but this works I hope)
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(this is one of the better ones I could find, but it's not perfect.)