It can be said that nobody understands the properties of various spiritual medicines and poisons better than they do.
Even though the physiques of demonic beasts are stronger than that of humans, they are ultimately made of flesh and blood.
They cannot withstand the poisonous fog that they concoct.
The dosage merely needs to be increased.
"The Heisha Palace will open the Black Sha Demon Cave, releasing all the flying undead within."
"With the help of many flying undead, the demonic beast army will be nothing."
Sea-splitting Demon King, the Master of Heisha Palace, knew his sect must take action since the other sects were already revealing their trump cards; he couldn't possibly do nothing.
Luckily, Heisha Palace excels at nurturing various types of undead and flying corpses.
With the power of these undead, they could also bring forth an undead army that could sweep away all opposition.
"The Xuan Yin Sect will dispatch a team of Xuan Yin Dao soldiers."