345 Ice-sealing Evil Demon 4yr

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Seeing the unusual change in the Teleportation Spell Formation, Yang Ling and the Corpse Wizard King took a few cautious steps backward on high alert.
As the spell formation rotated, the dark gas within the plaza grew stronger and stronger. After taking a few breaths, the high-level Magical Beasts such as the Unicorn and Chimera felt light-headed as if they had sniffed some powerful poison. 
"This is bad. This gas is Zombie Poison mixed with grievance aura. Everyone be careful!" After taking a few breaths of the dark gas, the Corpse Wizard King was shocked. 
To him, Zombie Poison was a terrific tonic. But to the others, it was a great poison. If one breathed in too much of it, he would die immediately. If one breathed in a little bit of it, it would stay in the body and could even be passed down from generation to generation. If it remained inert, no one would be harmed. However, once it became active, one would die on the spot. 
Top-level Zombie Poison?
After taking in a few brea