Board Thread:Theories and Speculation/@comment-25122992-20170307224943/@comment-31099706-20170308110829

Doesn't it take a whole alot of time to prepare for it? and you also need dna of the person you want to summon, it also needs a sacrifice for each user. the user can be caught in a genjutsu to undo the technique, the only one that was able to ecsape from that genjutsu would be Kabuto with sage mode and he was already massively enhanced by dna of other powerful ninjas. And even then its easy to kill the user but undoing the technique is the part that complicates it. well if a person with no intention of helping others and just want to kill the user can easily go through with it. even then I still don't know how Kabuto was able to controll all those edo's togather. he just doesn't seem to be that strong. If I am right, the edo tensai ninjas are mostly vulnerable towards amaterasu, human path,black receivers,bunch of other sealing techniques and can be teleported by certain Time space technique like kamui.