Invaders.
To be honest, Yu Sheng's heart had already been fluctuating before hearing these three words—with the revelation that Dark Angels could appear in the real world and when he heard the term "another planet" from Song Cheng's mouth. He had already realized that those beings called "Angels" were likely much more bizarre and powerful than he imagined. However, what he hadn't expected was that those things could actually be invaders... from beyond this world.
He had originally thought that these entities were similar to those in the Exotic Realm, merely a strange phenomenon of this world, at most a more dangerous "Super Entity."
"...No wonder Little Red Riding Hood advised me to avoid getting involved with the Dark Angels."
Yu Sheng subconsciously muttered quietly.