Tunnels

"You should be able to sense the gathering of the storm with the art," I said. "Right," he affirmed.

The wall is a wonder made from the confluence of power from four grand arts. It is powerful and releases a storm of energies that could wipe away even the Earth's Sovereigns.

The thing is the storm couldn't be sensed by the powerful soul sense of Earth Sovereign. 

I think forbidden power will help me sense it, but I don't want to use it in front of him. Not to mention, I would need a sample of storm energy to tune it for better detection.

Which I couldn't get without, experiencing the storm.

These are dangerous beyond belief, but also extremely short, lasting for less than a minute before disappearing.

"I hope you will be able to predict it quick enough for us to escape the affected area," I said.

"We will see," he said, and we begin to walk ahead in the giant barren tunnel.