The Ancient Rivalry

Rathnaar Whitlock, the Peak Saint who was once the most feared entity in the world of Vantrea; the one who slaughtered chosen Heroes like cattle and even killed a Royal Dragon showed a temperament of pride while introducing the dungeon boss' real identity. 

"The Lightning Dragon Emperor, Vildred." 

His words echoed on this floor while everyone was simply too gobsmacked by this fact. 

As the words exactly meant… the being in front of them was the Emperor of the Dragon Empire, the strongest empire in the entire world. 

[What the shit?! That's the ending arc plotline main boss of the story! Why did such a being appeared out of nowhere?] he asked in a baffled tone. 

"What is that child talking about?

Ending arc plotline main boss, what gibberish is he spouting?" asked the humongous and titanic Royal Dragon who was even taller than Blackwall's mythical rank form. 

"Ah, don't mind him. He's an otherworlder like all the summoned heroes.