The Asura Demon Emperor felt a bit similar to this murderous aura.
Neither of them had a physical form, and both of them existed in more of a spiritual sense. Back then, the Asura Demon Emperor had survived being sliced into eight separate pieces—this would have been impossible if it were another being, even if they were far stronger than the Asura Demon Emperor.
However, the Asura Demon Emperor was most afraid of spiritual attacks. As long as his opponent had a stronger divine sense than him, they would be able to severely wound him through spiritual secret techniques.
This murderous aura was such kind of opponent, with its attacks targeting one's divine sense.
The Asura Demon Emperor started gagging, yet he was still in his mist-like form, so how could he vomit anything out? After gagging for a while, he returned into the puppet wolf's body, and said, "Master, this aura is quite hard to deal with."