So once an Uchiha someone obtains MS they need to transplant their sibling's eyes into their self. but what is stopping two siblings from exchanging eyes? Why couldn't Izuna and Madara simply switch eyes to both get EMS?
Madara read the secrets on the uchiha tablet.Okay, but how did Madara (who didnt know the secret to get EMS at the time) know how to "merge" the eyes? i thought he just replaced it as soon as he could to regain his vision.
made me lol, troll...The eyes are not replaced, they merge.