The Yan Demon Sheep had been working with the Shadow Demons from the Night Demon Palace for nearly 50 years and was a key player in this affair.
He was intimately familiar with the details of the arrays they had constructed.
Nobody expected him to betray the Night Demon Palace, so after he handed over all the details of the array to Yang Fu, Yang Fu also learned the current, albeit imperfect, design drawings of the transmission array.
Yang Genshuo kept this drawing in his game, which he could call up at any time.
It was an unexpected find.
"However, it seems rather useless... Building it is quite expensive, and we have no allies in the Demon World to send items up for us."
For the time being, he tucked away this "Demon Realm Transmission Array (Incomplete)", saving it for a future opportunity to use it.