It takes a hundred years to set up one array node. Wouldn't it take forever to complete the entire protective boundary array?
Gu Lan couldn't accept that.
However, he also understood that cultivators' perception of time differed from that of ordinary people. Demon Clan, especially, had long lifespans and didn't mind this timeframe.
But Gu Lan did mind. He didn't want to wait until Simu grew up into a young woman while the defenses of their homeland in the mortal realm weren't completed with a hundred lines of defense.
So, he called all the Demon Clan masters together.
He sought their advice and asked for a good solution.
In short, it needed to be the shortest time, the most efficient, and the highest completion rate.
"Elder is so strict!"
"This must be a test from Elder!"
"No wonder Elder has such a powerful level of formation skills at such a young age. He must always demand this standard of himself! We should follow Elder's example!"