From publisher blurb:
The Oath of Burning Soul calls a Paladin to emulate Hrólfr, the Ancient Wolf, the Primal Deity of ambition, retribution and wrath. Known as the Hungering Flame, Hrólfr is a being of anger whose divine might grows from the anger others experience on the mortal plane. When someone acts on rage, they lend the hungering flame strength.
As an Oath of Burning Soul, you believe this is not a bad thing; there is much abhorrence in the world that deserves the focus of wrath. Paladins who take the Oath of Burning Soul often join the Order of Ashen Fang. This name derives from the physical appearance of the Hungering Flame. Hrólfr is an enormous lupine creature with eyes of fire and fur that smolders in the dark, giving a silhouette of smoky ash.