Board Thread:Theories and Speculation/@comment-45510280-20200416210937/@comment-32685487-20200428005541

I just read the novels. Itachi's Tsukuyomi does seem to take more chakra than the Amaterasu does as his 80 year usage made him feel a drained while using Amaterasu on Yoji and his bugs didn't have as much of a noted impact, despite Itachi using a "normal" Tsukuyomi on the bugs right beforehand.