Rakshasa

But when he spoke, no one answered. The only sound was that of bodies hitting the ground.   

He suddenly turned around and saw a cultivator in black holding a bloody dagger and killing the dozen or so other cultivators in black who were with him. 

Those cultivators with exceptional cultivation levels stood motionless, without resistance, allowing the sharp blade to slash their throats... 

The scent of blood in the air brought him back to his senses. After seeing the masked figure, he exclaimed in shock, "Feng Jiu! You're Feng Jiu!"

Those people didn't fight back because they were all struck by mighty pressure. This was the absolute Strong Exponent! It could only be done by people stronger than them. Other than their master, Feng Jiu was the only one who could do it. 

He was about to flee when. But, when he turned around, he was attacked by a fierce sword intent. The man froze and fell to the ground.