Ushiro teaches pyrotechnics.

[Gaara]

-waits patiently for Ushiro senpai-

 

[Ushiro]

*arrives*

Hello newest student of mine. Before we begin, tell me all you know about fire release, also known as katon.

 

[Gaara]

Thank you for joining me, Sensei.

From my knowledge Katon is one of the basic elemental nature transformations. It is performed by moulding superheated chakra inside the stomach before releasing it via the lungs and mouth. There are also variants to this in the form of some mediums such as the use of gun powder, explosive tags and chakra flow into a weapon.