Spirit King

"Welcome to the fourth floor. You have fifteen minutes to defeat the demon."

On the fourth floor of the Demon Sealing Pagoda that was in a lava environment, Yuan patiently waited for the gray demon to show up.

A few moments later, the gray-skinned demon with a broken horn came out of the lava and stood on the platform before Yuan.

"When you're prepared to start the challenge, say 'Ready' out loud." 

Yuan didn't immediately start the fight this time. Instead, he took a few moments to silently stare at the demon.

"What's wrong? Aren't you going to say your famous line? That I am not worthy to fight you?" Yuan suddenly spoke with a calm smile on his face.

The gray demon narrowed its eyes at Yuan.

"You have grown a little stronger since I killed you." The demon responded a few seconds later, almost as though it retained its memories of their last encounter.

"Just a little stronger?" Yuan chuckled.