Fire Release: Echo of Annihilation

A technique mixing Fire Release: Great Fire Annihilation with absurd amounts of pure oxygen created from wind chakra. The result is a burst of invisible flames which completely oxidize the very environment into pure carbon dioxide, leaving literally nothing behind. To the enemy, the very air in the entire area becomes distorted as the very heat sears through the environment itself, coursing through the landscape and eviscerating all it touches. Upon impact onto any biological creature or substance, one would see the struck body parts literally disappearing from sight as it is immediately oxidized through the incredible temperatures and/or poisoned by the vast concentrations of oxygen infused into this technique. This technique disrupts the sights of even doujutsu users due to the heat and chakra distorting the very air around it, and is said to be impossible to absorb even by chakra-absorption techniques as there is a layer of superheated air at the ends of the technique, such that the chakra within is "protected" from conventional absorption from moves such as the Preta Path. This in turn makes Fire Release: Echo of Annihilation one of the strongest S-ranked fire techniques, said to even be able to overpower Amaterasu courtesy of the amount of heat it radiates alone.