Because Orochimaru bound them to their will the first time.WHY HE didn't do it the 1st time he is summoned by ET?
The first time he was summoned he was sealed Orochimaru didn't release it like Itachi forced Kabuto to do. So in all likelihood he will break it as it is his jutsu and Madara explained the weakness already.WHY HE didn't do it the 1st time he is summoned by ET?
grrrr u beat me to it :'(Because Orochimaru bound them to their will the first time.
OT- If Orochimaru let's them have their will back.
I agree with this, though I don't think Tobirama is going to try to break out of it in the first place.madara only broke edo tensei because kabuto foolishly let him roam with a free will. Orochimaru knows better than to let pawns move on their own.