Board Thread:Theories and Speculation/@comment-36512555-20200101053037/@comment-32685487-20200409195107

It wasn't Chidori, after looking at the Chidori from earlier panels. Look at the panels for Kirin and its prep again, it was just lightning chakra change which wouldn't require him to have enough chakra to use Chidori in fact the whole point of Kirin is he doesn't need but just a smidgen of chakra to use it in the first place. But the points from before remain, the actual Lightning wasn't made of chakra so Itachi would not be able to make it out when everything was so extremely bright. Only thing he could see at that point was the extreme change in lighting outside.