Dozens upon dozens of spells struck the Blackwater Extreme Wind Formation, making the formidable second-tier superior-grade formation tremble.
They were at an absolute disadvantage in both Foundation Establishment and Qi Refining combat strength. Even with every effort to intercept the attacks, they could not stop the fierce assault.
Spell after spell and magical artifact after magical artifact surged forward to strike the formation. Every so often, a deafening boom erupted, shaking the hearts and minds of the many Qi Refining disciples inside and turning their faces pale. Their fighting spirit was clearly more than a notch below the enemy's.
Although most of those scores of spells were only Qi Refining spells, quantity could bring about a qualitative change, posing an enormous threat to the formation.
Together with the enemy cultivators' ceaseless attacks, this placed immense pressure on Cao Mengyu, who controlled the formation. She dared not pause her hand seals for even a moment.
The Blackwater Extreme Wind Formation combined offense and defense, with an emphasis on defense. Yet the enemy cultivators' attacks were so fierce that Cao Mengyu could not even direct it to counterattack. She could only devote all her strength to defense.
Clang, clang!
Liu Yu's expression was solemn, but the lake of his heart remained perfectly still. He sent the Mother-and-Son Soul-Chasing Blades and the Sharpgold Sword beyond the formation to clash fiercely with the enemy, intercepting the attacks of two top-grade magical artifacts.
Those two top-grade magical artifacts belonged to two different Foundation Establishment cultivators. Each was only controlling a single top-grade magical artifact, clearly holding something back.
Both were merely foundation establishment early stage cultivators. Liu Yu could handle each of them wielding one top-grade magical artifact at full strength and still have strength to spare. After undergoing Demon Fire Refining Essence, his magical