well we have already seen things activated on sight or other things in the manga
like when sasuke saw tobi's sharringan it activated amatarasu
or when naruto's seal was about to break the forth appeared
so what if itachi is similar to that what if at the appearance of dano's technique itachi appears
like when sasuke saw tobi's sharringan it activated amatarasu
or when naruto's seal was about to break the forth appeared
so what if itachi is similar to that what if at the appearance of dano's technique itachi appears