——"Radiant Golden Red Body".
As previously mentioned, this is a form within "Breath of Thunder" that originally did not exist.
"Breath of Thunder" has a total of six types of sword forms, namely "Thunderclap and Flash", "Rice Spirit", "Gathering Swarm of Thunder", "Distant Thunder", "Hot Showers of Thunder", and "Electric Shock Thunder Roar", from the First Form to the Sixth Form. There is no such thing as a Seventh Form.
However, Agatsuma Zenitsu, who could only use the First Form of "Breath of Thunder" and was not capable of utilizing the other five forms, managed to surpass his limits through his own efforts and reached a realm that other inheritors of the "Breath of Thunder" could not achieve.
