C176 A Spell Formation Was Simply Child's Play

A fourth stage formation was enough to trap a Second Heavenly Layer practitioner to death.

Fifth step, even someone at the fifth level of Heavenly Dipper wouldn't necessarily be able to break through it.

An array formation at the sixth stage was enough to trap a powerhouse at the peak of the Heavenly Dipper Stage to death. And the existence of a Rank 8 Formation