Without the aid of a large-scale array, even a Nascent Soul Cultivator like Canyuan True Monarch could do very limited damage to a High Tier Spirit Vein.
Canyuan True Monarch had only used his Magical Power to unearth a portion of the Demon Vein, allowing the Demonic Qi to dissipate into the air.
This action would only interrupt the flow of Demonic Qi within the Demon Vein for a short time. After a while, the Demon Vein's own healing ability would allow it to reconnect the severed part.
"This is a temporary solution, not a permanent cure. We would have to set up a Tier Four Heaven and Earth Collapsing Array here to completely shatter the Demon Vein within this mountain range. Only then would it be unable to regenerate for at least a hundred years."
