Currently, the setup at the frontline had been greatly changed to deal with the final Beast Tide properly.
By using earth spiritual qi, tall walls had been erected.
many people ranging from third layer qi gathering to sixth even seventh layer qi gathering had used a lot of spiritual qi to build this wall.
The wall wasn't used in the previous two beast waves, because it wasn't prepared, while Luo Tian and the rest were fending the beast wave, people who were not fighting had been building this wall.
the same pattern had been followed on the other three sides
Qian clan, Gong clan, and other small factions had to bleed in order to provide many vitality pills and spirit stones to everyone, so they would build the wall and recover their spiritual qi on time as well.
This wall was built for those who weren't powerful enough to participate in the beast wave directly.