Board Thread:Theories and Speculation/@comment-9338136-20180716151639/@comment-34436445-20180716191527

Both madara's and sasuke's EMS had a straight pattern giving them fluidity in their movement. It provides better reaction and movement in fighting I guess. Madara observes sasuke's EMS and finds that it's similar to his own and after awakening his rinnegan, theorizes that both of them may a connection beyond blood. The straight pattern is only in Madara and sasuke EMS because of being indra's reincarnation, at least that's what is implied. Though only sasuke and Madara awakened their EMS.