553 spoiler:

naruto’s rasengan hit muu.
kyuubi chakra is so special that it able
to hit muu’s real body. the body itself
turn into ashes.
naruto also able to sense mizukage’s
location too. the scene change to itachi now meet
with kabuto. someone is standing
beside him but i can’t see his face.
itachi seems to know him. the chapter
end.