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"To the southwest of this area, where there's a Volcano with a large tower made out of red stone, lays the first entrance to the Venerable of Flame's Inheritance, an infernal place that connects to the Infernal Catacombs." He said. "If you can enter such an inheritance and complete its trials, not only will you'll receive the power of this ancient ruler, but also, a shortcut to the Muspel's Bone Mountain Range."
The inheritance of the Venerable of Flames? The one that brought so much destruction? It is said that he was just as evil as the Venerable of Blood. Would he really leave his inheritance in the open without wanting to revive through it somehow?
Though, if his inheritance is exposed like this in the open, then there's no point in not going there to investigate the place, and if it can work as a shortcut to our goal, then that makes it even better.