The brass door, originally named the gate of cadira, was said to be a mysterious door made by the last wizard King.
Other than a specific key, even if you pulled the star Annihilator cannon over, it wouldn't be able to break it.
From Xu Nan's point of view, the second round of the examination was filled with the Warlock King's malicious intent.
This black goat muse was said to be the wizard King's mortal enemy. He had once committed a monstrous sin, so he was cursed by the wizard King and turned into an immortal black goat, guarding the gate of Khedira for generations to atone for his sins.
The black goat's combat strength was very tyrannical. Xu Nan estimated that if they fought head-on, even if a few legends came, they might not be able to snatch the key from its hands.
It was mainly because the location of the key was very disgusting.