Ask this question alot I belive its some king of new dojustsu seeing how to have rinnnegan you have to have uchiha and senju dna which i doubt he had both
and that dojustsu is surly not sharingan
No it was sharingan i believe... or it could have been both sharingan and rinnegan the oldest son passed on the powers of the eyes .... and the youngest had the power of body like Naruto
Ems
Because rinnegan minus yang chakra equals the ems and he didn't inherit yang chakra
When madara got yang chakra from hashi a senju he awakened the rinnegan