Although Zhao Gongming was complaining in his heart, saying that the Immortal-Slaying Sword Formation was the strongest formation, what Demon King Ox said wasn't without reason.
During the Shaman-Demon War period, the two clans suppressed the Primordial Wilderness for all ages. Even the current Six Saints didn't dare to challenge the two clans before attaining saintliness, which says a lot.
And this Star Dipper Formation of Complete Cycle was the strongest formation of the demon clan in ancient times, hailed as the number one grand formation in the world, which is naturally reasonable.
As for later claims that the Immortal-Slaying Sword Formation was stronger than the Star Dipper Formation of Complete Cycle? Sect Master Tongtian acquired the Four Immortal-Slaying Swords after the Shaman-Demon War.
Let's not talk about what Demon King Ox and Zhao Gongming were thinking.
