Nero had long guessed that this Thunder Bull's strength, and although it could threaten a human Core Formation master, defeating one was far from the question. The Thunder Bull in question was one at the peak Grand Cultivation Realm, half-step into the Core Formation Realm. And due to how tenacious beasts are compared to humans, an initial-level Core Formation master would be hard-pressed to score one over a beast like this.
Nevertheless, Nero's overall strength resided in the late core-forming realm and was steadily approaching its peak.