i think it is the two tools from when itachi fought sasuke.
the sealing sword, and whatever the shield was that reflected/blocked everything. i think in this battle the sealing sword would be extremely useful, allowing naruto to seal all the edo tensei jutsu
i remember how orochimaru said he was looking for it everywhere... so i don't think itachi woulda just let something as previous as that like that go with him to his grave
we can't be too sure on this because either it itachi activated it purposely, or the crow responded to his mangekyou. the chapter did not make it clear of what came out of itachi's mangekyou, so we will have to wait until the next(?) chapter to confirm
Originally Posted by PositiveEmotions