"Poison gas?"
Seeing the black smoke that had formed after the grenade exploded, Hu Xuanyi immediately threw out a Profound Technique Capsule. These capsules could only store low- and mid-level Mystic Arts below No. 40.
With current technology, mid- and high-level Mystic Arts still could not be stored.
However, among the low- and mid-level Mystic Arts, there were plenty capable of creating fierce winds to blow away poison gas.
The capsule Hu Xuanyi threw now contained precisely such a Mystic Art.
Hu Xuanyi had already activated the capsule before throwing it. Once the Mystic Art inside was triggered, it burst the capsule apart and transformed into a tornado that shot into the sky.
Under such violent airflow, any poison gas would have been blown away.
However, amid the howling wind across the plaza, the mass of black smoke remained condensed and failed to disperse.
Instead.
The tornado's force was rapidly weakening. Soon, the wind vanished entirely. It lasted far less time than normal, causing Hu Xuanyi to frown.
The black smoke then reached the Golden Light Barrier Hu Xuanyi had set up earlier. As soon as it touched the barrier, its radiance rapidly dimmed.
At the same time, the black smoke gradually seeped through the barrier and moved toward Hu Xuanyi and Wang Houtu.
Hu Xuanyi's expression changed. "Something's wrong. This isn't poison gas."
"It can weaken Mystic Arts and even seep through barriers. This thing was made from fragments of the Abyssal Vein!"
Using fragments of the Abyssal Vein to create all kinds of lethal weapons and using them against cultivators was already a half-public secret.
The Nether Particles in the Abyssal Vein were "deadly poison" to cultivators. If cultivators absorbed a large amount of Nether Particles, they would die.
At the very least, their combat strength would be