The original Black Tortoise Array Art was itself a ninth-order supreme-grade inheritance, but what Chen Fei had obtained was only a fragment.
Once Chen Fei cultivated the new Black Tortoise Origin Art to the great perfection realm, he could still deploy ninth-order supreme-grade formations. At most, his deployment speed would fall short of the original Black Tortoise Array Art.
When formations were used as a direct means of combat, deployment speed was undoubtedly crucial. Otherwise, if he could not even finish deploying a formation during a battle, he would effectively lose his most important source of power.
Condensing formations in the air to fight an enemy was vastly different from setting up grand formations that used large quantities of top-grade spirit crystals, or even Heaven Piercing Mysterious Treasures, as their array eyes.
Condensing formations in the air emphasized swift execution, so their power was naturally inferior to properly deployed grand formations. It also had another drawback: much of the expenditure was drawn from the cultivator's own body.
For instance, the ninth-order high-grade profound formation Chen Fei had previously deployed barely crossed the threshold of ninth-order high-grade power. Against a ninth-order late-stage expert, without other corresponding powers to support it, having the formation broken was almost inevitable.
That was precisely what had happened when Chen Fei faced Sui Bingqing of the Tiger Clan earlier. His ninth-order high-grade profound formation could not hold out for long.
If a ninth-order late-stage expert like Sui Bingqing were trapped in a properly deployed ninth-order high-grade grand formation, she might not perish with her Dao extinguished, but serious injury would be unavoidable if she wanted to escape.
The Formation Clan had also condensed formations in the air when they ambushed the Destruction Dao Ancestor.
A grand formation that required top-grade spirit crystals or Heaven Piercing Mysterious