Board Thread:Versus Debates/@comment-1872728-20170111185046/@comment-30168130-20170119002204

true, but that's exactly when he lost them (bijuu's chakras). he used it to defuse the jutsu, and that jutsu of their own (naruto's/sasuke's), needed both naruto's bijuu chakras, and sasuke's use of his rinnegan. that's when he wasted it. simple.