Chapter 644: Chapter 639: Grand Demonstration, Conclusion

Both Mortal Sovereign Alchemists vanished. They arrived before Ma Luling with astonishing speed, their hands both reaching out to touch her shoulders. Mu Yura grabbed the left and Ma Leihan grabbed the right. They were enveloped in the Worldly Domain, but it was inconsequential to cultivators of their levels.

They thoroughly sent in their spiritual sense and inspected the Domain Seed. They were careful, not wanting to harm it. The verification of this Domain Seed's validity was monumental, and with numerous spiritual senses present, they didn't dare to mess around or play any tricks. 

Mu Yura breathily said aloud, "This should be impossible!" 

Ma Leihan added, "How can this happen?"

Ma Sujiang had inspected Na Xinyi's Domain Seed before from a distance, but she didn't try to do so directly after because she felt Wu Yu's mark on her body. If she acted, that mark would've certainly retaliated and struck her as a threat. She didn't dare act carelessly.