Deng Bagu had poured too much of her soul into her Earth Penetrating Divine Needle, believing that even the Earth's crust could not withstand its power and that it could shatter any Protective Dharma Treasure in one strike.
She also understood that this was her last chance. With her insight and experience, she easily recognized that Shi Feiyang had not used his full strength; had they truly fought to the death, she would have long been utterly defeated and, even if she had not lost her life, she would have had to flee in disgrace. At this point, she knew she had to break his Iron Umbrella to regain some measure of dignity; otherwise, her reputation as the "disastrous goddess," cultivated over centuries, would become a joke.
Shi Feiyang was determined to make her admit defeat wholeheartedly and thus let her attack fiercely with the Earth Penetrating Divine Needle for half an hour.