Without any surprises, after the dragon rider had turned its head several times and subsequently spotted Zhou Tian, it rushed straight at him.
When it first encountered Zhou Tian, it fled due to only having a single dragon head and knowing it stood no chance against Zhou Tian. But now, the dragon rider was at full strength and due to its natural instincts, it could not resist the urge to destroy everything in its sight.
Zhou Tian being considerably stronger, according to the dragon rider's inbuilt programming, became the second target. Seeing as the first target had already been dealt with by the dragon rider, it couldn't resist launching an attack on Zhou Tian.
Everything happened so suddenly, Zhou Tian was caught off guard; the dragon rider had already charged towards him. Therefore, when confronted by the dragon rider's attack, Zhou Tian could only defend passively.