Daijōmukenjigoku

Daijōmukenjigoku (無間地獄大城, Great Citadel of the Hell of Incessant Suffering) is a Fire Release technique used by [--].

Overview
After molding the needed chakra [--] it into his surroundings, expanding its  in the form of a sphere. Anything engulfed by its boundary is instantaneously incinerated by the immense heat and unable to escape its confines. The heat emitted within the area of effect is extreme enough to destroy a large section of Gojira's tail enhanced by the Ice Release Chakra Mode.

Trivia

 * Know as the Avīchi hell, it is the lowest level of hell in the Desire Realm. It is commonly referred to as the Great Citadel of the Avīchi Hell because it is surrounded by seven solid walls of iron, making escape impossible for its inhabitants.