Tsukyomi is useless against Obito.
Izanami would work if Itachi somehow manages to pull it off. Unless Obito uses Izanagi then I'd guess Izanami won't need the prep. I still don't know how Izanami works when used against Izanag since Izanami was created to stop it.
Izanami would work if Itachi somehow manages to pull it off. Unless Obito uses Izanagi then I'd guess Izanami won't need the prep. I still don't know how Izanami works when used against Izanag since Izanami was created to stop it.