C2866 Nether Fiendish Gas
The examination for the new students of the Sacred Courtyard was to ring the bell of the underworld.
If one wanted to ring the bell, the cultivators that came to take the test had to pick up the hammer before they could ring the bell.
The Dark King's hammer was very heavy.
Under normal circumstances, cultivators below the Divine Spirit Realm would not be able to wield the Ghost King Hammer