The Demon Wolf King Furhengir wasn't just a powerful rank five demon beast from the Gehenna Realm and one of the Evil Wolf God Kezan's descendants.
After Balmodon the Undying stole the Evil Wolf God Kezan's divinity, Balmodon the Undying also made the Demon Wolf King Furhengir one of his pets.
Furhengir's Domain, the target of the Third Great Expedition, was just a tiny section of the vast territory under Balmodon's rule in the Gehenna Realm.
And although the Transcendent Witch of Black Rose succeeded in felling Furhengir during the raid, the people on the human side came to learn how insignificant their strengths were compared to the seven Great Devils of the Gehenna Realm.
The seven Great Devils were divine existences that far surpassed rank five; they stood at a level of power that even the seven Transcendent Witches have yet to reach.