When Huang Chen controlled the Magnet Magic Treasure Soul Conqueror to spew out fog, the Demonic Beasts hiding inside the cave sensed the dangerous aura. They frantically dug into the earth, blocking up the ventilating cave entrance; they would rather suffocate than let the poisonous air from the outside kill them.
Silence, for a moment the space became extremely quiet. Normally, at night, Demonic Beasts would snore in their sleep or howl occasionally, but at this moment, they all held their breath, fearing that the poison would seep into their bodies.
Animals have an innate ability to sense danger. The stronger Demonic Beasts held their breath, the slight intrusion of the poisonous gas from outside had little effect on them.
The weaker Demonic Beasts felt limp and began foaming at the mouth; this was a sign of poisoning.