In the vision, Uchiha Izuna had attempted to dodge, but Black Zetsu grabbed him from beneath the earth, preventing his escape and leaving him gravely wounded.
Black Zetsu’s objective was, naturally, to provoke Madara into awakening his ocular powers and to incite hatred between him and Senju Hashirama. The plan succeeded, though only halfway. Who could have imagined that Madara would actually believe Senju Hashirama—a man whose "ultimate techniques" were treated by Tsunade as mere passive abilities—when he claimed that a kunai could be used to commit suicide?
Back then, when Black Zetsu saw Madara convinced by Senju Hashirama and agreeing to join forces to create a Shinobi Village, he had almost jumped out to stop them. Fortunately, he later successfully manipulated Madara into leaving Konohagakure, which paved the way for what followed.
Chapter 171