A person's aura could be concealed, but the aura of the world was hard to conceal.
What was the aura of the world?
For example, if one was born in the heaven realm or the primordial realm and cultivated in these two worlds for a long time, comprehending the nomological laws of the two worlds and absorbing the original Qi of the two worlds, one's body would naturally carry the aura of the two worlds.
This kind of aura was contained in the essence of life and was very difficult to conceal or remove. This was the essence of the world.
After the old man entered the door, he was detected to have the aura of the heaven realm and was killed.
Who would specifically search for living beings from the heaven realm? It was definitely the evil god tribe!
It was obvious that the evil god tribe had created this gate. Anyone who wanted to enter the city would be detected to have the aura of the heaven realm.