Google Translator and I have no idea what "chattic" black metal means. It should mean something like "anthemic", as TET know very well how to write varied songs, which stay in mind for quite a while.
All tunes are characterized by high intensity and pagan majesty. TET's style is based upon melodic black metal, which mainly remains in mid-tempo regions. As I know TET's complete discography, I can say that "For cold shades" is their masterpieces to date, somehow like Amon Amarth on Black Metal!
Favorite track: Alpha And Omega.