After the Sasuke vs Itachi fight Sasuke shot Obito with Amaterasu. Itachi programmed Amaterasu to go off on Sasuke's eye when he saw Obito's Sharingan. But how did Obito survived Sasuke's Amaterasu. He walks it off just fine with no scorch marks on his clothes.
Let's find out if Obito was just faking getting hit by Amaterasu or if he was caught off guard by Itachis's plan. And let's take a look at how he survived. If not Kamui, was it Izanagi?