he needed him to convince the vatican to use rin as a weapon. pay attention

he could have done many other things other than that. he's a demon so it's pretty obvious he shouldn't be trusted, He is the Head of the school and basically made the Shields around it this meaning he could have gotten another demon or whatever else to prove his point.
and with those Keys that basically open a door to anywhere this could have been easily done much like the example from the Last episode and how Gale got in without being noticed until he attacked.

what demon other than amaimon would be strong enough to run through the top exorcist and cause a huge problem for the vatican?

easy Satan

My god... Do some of you pay attention to anything other than Naruto?
I mean some of your posts literally made me facepalm hard enough to leave a red mark....

why dont u be more specific

Nah, after this I'm not gunna post till next ep so that there won't be another 4 pages of arguing.

I think the hamster think was just a joke.

The one that Rin fought at the meeting, was definitely the real one.

I might be mistaken, but in order to use one of those keys to teleport something, you need an actual door.

a car door wont work?
it opens and closes, it also has a place for a key.
seems logical to me

Car does work, didn't you see the van?

I meant, you cant just open a portal out of nowhere.