Board Thread:Boruto Discussions/@comment-25100062-20160518163433/@comment-25122992-20160518164403

It doesn't seem like a regular Juinjutsu as for me. Given Kawaki's words about the end of shinobi era, I presume that the tatoo is some lind of power with no connection to the regular chakra, akin to Gelel Stone power, and this power is responsible to the Konoha destruction/Naruto's presumable death, but since Boruto does possess it too, he's kinda the only person capable of stopping Kawako.