An Uphill Battle

It was the MDT that alerted them when it detected something was wrong.

At that time, everyone was busy combing for clues in the hall. White Flame and Hesperides were trying to figure out what kind of weapon could blow that big hole on the roof. Hasse and Hao Ren were skimming through Amatura's documents. No one had noticed the threat—just like the time the Shade of Chaos attacked Hao Ren; it came undetectable, not even the most experienced demon hunters and demon king like Y'zaks could see it coming. It was in that critical moment that the MDT flew out from Hao Ren's pocket and sounded the alarm. "Attention! Abnormal energy detected! Abnormal energy detected!"

The MDT's unique sensor had recognized the enemy's energy signature and quickly identified the threat.