Chapter 4172

Since the Celestial Martial Emperor could create the Sutra of Heart-formation, his level of formations must be extraordinary and incomparable.

The Curse Devil King took a deep breath, and then his eyes showed unprecedented caution. He said seriously to Zephyr, "Well! Zephyr. Let's not delay any longer. We'd better break this formation as soon as possible!"

"I have to remind you of something!"

"Although I was able to tell that this lightning storm cloud was the key to breaching the spirit formation!"

"However, I am unable to guess if this is a fake or if it is the real formation breaching point!"

"Perhaps you'll be able to successfully breach the formation once you trigger it. That would be the easiest outcome!"

"Perhaps, if you trigger the formation inside, you will trigger the hidden killing formation inside, which will lead to a more horrible killing intent. This is the most difficult result! Not only do you need to find a way to get rid of the killing intent, but you also need