Obito was furious that his teacher had failed to save Rin Nohara, furious that his teacher was always one step too late. All that rage drove Obito to try to kill his teacher in this battle. Even if he could not kill him, he would interfere with him and make him lose everything, just like Obito had!
The chains shot out again. Minato Namikaze flashed aside to evade them, summoning specially made kunai into both hands and placing them on either side as coordinates. "At a time like this, it no longer matters who you are! But why? Why did you launch a surprise attack on Konoha?!"
"Why? How should I put it? If I had to say, it was a whim!"
With that, Obito attacked again. The two crossed paths, and Minato Namikaze turned back midway, striking with a one-handed Rasengan. It passed through Obito's body once more. Obito sneered and continued, "Or you could say it was planned long ago. It is for war, and also for peace! You no longer have any hope!"
They stood opposed to one another. One wore a grave expression, clearly distracted, while the other was relaxed and casual, as though he were merely playing a game. Minato Namikaze threw a kunai at him, his body turning into a streak of golden light as he flashed toward Obito. Obito phased through the attack, sweeping his chain in an S-shaped path through the air like a venomous snake, harassing Minato Namikaze.
The golden light passed through Obito's body. Obito turned, intending to grab Minato Namikaze's arm and repeat his earlier trick of disrupting the other man's chakra. Yet he never expected the reflected kunai to shoot out from beneath Minato Namikaze's cloak. He swiftly phased again, then flung out his chain. Minato Namikaze passed