Or he could smoke some green, that'll get you high too.
I think Ninshuu is an irrelevant factor at this stage of the manga but we'll see.
We do not know what ninshuu is nor do we know if kishi will let sasuke obtain ninshuu as well
yeah that's still questionable. but remember when Hagoromo chose Ashura over Indra to rule Ninshuu? This implies Indra knew ninshuu or something.