He gave it a name. It was called the Saber Mountain Purgatory Array, a low-grade Heaven Rank.
The effect was very strong. Once they entered the formation, the formation would change and simulate all kinds of terrifying scenes, such as a sea of fire, hell, and so on. It would increase the strength of the soldiers and subtly leave a mark in their minds. This was very important, and it was the key to controlling the northern army.
The more times one entered the array, the deeper the imprint would be.
As long as he didn't activate them, the seals wouldn't explode, and they wouldn't affect the army's mind. No one would be able to sense them, let alone discover them.
When that day came, he would activate the 200,000 mark of the Northern Army and pledge his loyalty to them. At that time, it would not matter even if they were discovered.
He called over his personal guards and handed over the materials for setting up the array.
Soon, everything he needed was delivered.
