Even for Ling Zhenfei now, using Northern Spiritual Energy to knock on the door was a very difficult task.
Ling Zhenfei knew there was definitely a master outside manipulating the spiritual energy, but he didn't know what this master was up to.
However, Ling Zhenfei decided to open the door anyway, just to see what this master wanted to do.
After opening the door, a stream of spiritual energy rushed towards Ling Zhenfei. If it were anyone else, they would be extremely shocked, but Ling Zhenfei wasn't surprised, he didn't even move.
Because the spiritual energy had become very weak after transmitting such a long distance, it posed no threat to him at all.
The spiritual energy pretended as if it was going to attack Ling Zhenfei, but he made no movements, and it instantly disappeared.
Then he felt a Divine Sense locking onto him, which surprised Ling Zhenfei, because he had been using his own divine sense to search for this person's location but couldn't find them.
