Obito's Mangekyo Sharingan never lost its light despite the usual drawbacks. Obito survived being crushed by a boulder in a controversial plot hole. Obito's war for the Nine-Tails and Eight-Tails ...

But as powerful and dangerous as he was, Obito was still no match to titans like Madara Uchiha and Hashirama Senju. That changed when he betrayed Madara and became the jinchuriki of the Ten-Tails.