The Flame of Wrath, known as Flame of Rage in VIZ translations, is an extremely powerful and exceedingly rare type of Flame. It is said that among the Vongola Bosses, the only one who fought with bare hands was the Vongola Secondo because of this Flame.
The special characteristic of this Flame is its extreme destructive power which can reduce anything to ashes. The Flame was seen only when Vongola Secondo was enraged; thus, it earned the title "Flame of Wrath" to support this theory. Unlike regular Dying Will Flames, there is no need to use a Ring to ignite the Flame.