Since Zhou Tian can help him out of trouble, it naturally means that even in a Divine King-level fight, Zhou Tian can also play his part.
The original impact of Zhou Tian was somewhat uncertain in the mind of the Undead Divine King, despite some guesses. But as the matter of Zhou Tian killing a Divine King became widely known, the Undead Divine King came to clearly recognize that perhaps the strength of his ally Zhou Tian was much greater than he initially thought.
Though he didn't truly regard Zhou Tian as an equal, after learning of Zhou Tian's deeds, the Undead Divine King considered Zhou Tian as essential assistance against the Space God King.
In that situation, the Undead Divine King naturally would not allow Zhou Tian to die.
No matter what Zhou Tian was thinking at the time, or why he suddenly started fighting, merely the possibility of Zhou Tian facing danger was enough for the Undead Divine King to prevent Zhou Tian from battling the Space God King alone.
