chapter 872 What is invincible?

The horn sound, sometimes loud and sometimes deep, seemed to emanate from the depths of space. The source of the noise wasn't clear, but it enveloped the entire area and was audible to everyone. Many capable people from the mortal world were on the verge of losing their composure at this moment, feeling as if the horn was like an enchanting melody capable of drawing in their souls. The various influential individuals were perplexed by this, not knowing where the horn sound was coming from. However,...