Board Thread:Naruto Discussions/@comment-945885-20140709082448/@comment-24519434-20140720080055

Mrlmm0605 wrote:

1. The effect of the new Rinnegan chakra caused the newly empowered Sasuke to gain the ability to subconsciously access the Black Lightning technique. Or Yin chakra has been added to the mix. Or both, Black Lightning is really ill-defined in nature.

I was referring to the third Raikage's lightning tattoo.