Board Thread:Naruto Discussions/@comment-30381420-20170113094728/@comment-6036561-20170113173406

Leaving out the obvious choices of the Tailed Beasts (Juubi included) and the paths of pain (I don't consider them to be summons), I think that only two come to my mind: the giant clam (even if it is not strictly a "foe") and the ultimate summon. Well, and obviously all the powerful reanimated, if we consider them "summons" :D

Namikazenaruto9 wrote: 4) the New 3-way Deadlock

Well... I can agree with Gamakichi, but I do not remember Aoda doing something worth of him being called "formidable foe"