None other;
The presence of that emerald Great Turtle Shell provided a strong sense of security. The bombardment by a group of masters, including the offensive tactics of Ancestor Witch Xuan Ming, succeeded only in making the Great Turtle Shell shake and wobble.
"Without a sacrificial treasure, you can't break through our precious shell!"
Mother Gui Ling said triumphantly:
"Release Immortal Huanglong now, or I'll have to unleash the Immortal Sword and stab you!"
A few masked men in black instinctively fled backward.
The corner of Ancestor Witch Xuan Ming's mouth twitched slightly. She transformed into her true form and bombarded the shell below with a tempestuous fury, but the shell remained as unyielding as ever, only shaking slightly more than before.
Seeing this, Li Ping'an was greatly relieved.
He began to diligently investigate this 'underground city', and soon found several locations covered by Formations.
The treasure vault of the Witch Clan?