Nebula Release: Aurora Cloud

By manipulating the dust and gas in the atmosphere with wind release, and mixing it with Yang Release chakra for offensive/defensive properties, one can create a smoke screen made up of these nebulas. The high concentration of gas makes it rather poisonous to the human body, thus victimizing anyone who comes across this cloud. The user can also heat this cloud up with Yang Release in order to burn anyone within it. The user can mask his/her presence within this cloud, making it rather hard to track them down, especially with techniques such as the Sharingan or Byakugan; the technique hazes their chakra (as part of it's nature).