On the way back, Long Zi suddenly spoke. "When you go to the Sea of Heavenly Mystery, I'll go with you."
"The Sea of Heavenly Mystery?" Hearing Long Zi's words, Luo Yunji and Zhang Xiaofan both froze. "Is it one of the Five Seas?"
"Yes!"
"You know where it is?" Zhang Xiaofan asked nervously.
"No!" Long Zi paused, then continued, "I only know it's in the desert of the far west."
"The desert!"
"The Sea of Heavenly Mystery isn't like the Heartless Sea or the Sea of Nether Domain, with a fixed location. It moves! So no one can point out exactly where it is. To encounter it is a tremendous stroke of fortune."
"By luck?" Zhang Xiaofan lowered his head with some difficulty, no one knew what he was thinking.
"Black Serpent and I both need the help of the Sea of Heavenly Mystery." Long Zi's tone carried yearning as he continued, "If I rely on myself to nurture it, I don't know when the child will be born. Now that the spiritual energy of heaven and earth has weakened, if I accumulate it by myself, it may take a thousand years before the child can come into the world."
"If you hadn't mentioned it, I almost would've forgotten! It's been so long and there still hasn't been any movement. Aren't pregnant people supposed to have big bellies?" Luo Yunji said, lying on Long Zi's head. After thinking for a moment, he added, "Then when are we going?"
"That depends on you!" Long Zi's muffled voice rang through the sky like thunder.
"Once we find the Sea of Heavenly Mystery, we'll be able to find the Thunder Marsh Sea. They are together!"
Hearing Long Zi's words, Luo Yunji froze again. "Can two seas be together?"
"I don't know much