Board Thread:Versus Debates/@comment-44916514-20200123204114/@comment-32685487-20200211181629

He already had 1 Mangekyo open and stared right at the Crows eye, nothing happened. He closes his eyes for Amaterasu and activates it while staring at the Crow and then bam the Crow activates Koto-Amatsukami. It was the MS Dojutsu that made the activation happen.