Kintaro kneads chakra inside his body to convert to black flames. He then Expels it from his body in a large ocean of black flames using the massive amounts of chakra flowing through his body from the Chakra Personification Technique. These flames obliterate literally almost any defense constructed by the enemy, and turns the place where his flames were released into a place that is literally impossible to survive in, as the ambient temperature rises to a bare minimum several million degrees Celsius, utterly vaporizing anything in the vicinity. This is disregarding the gaseous state of solid rock and metal which are on the ground level.