My Little Pony: Friendship is Magic, Season 4

Lord Tirek:
Give my regards to Cerberus.

Discord:
You meant our will, didn't you?

Lord Tirek:
Of course. Here, I want you to have something. This was given to me by someone very close to me. I give it to you as a sign of my gratitude and loyalty.

Discord:
Oh, my! I do love a good accessory. I suppose that's Rarity's influence.

Lord Tirek:
[laughs] Amusing. But we have no time for such things. With the princesses out of the way, we can now- [sees a stained glass illustration of Twilight Sparkle] [shouting] Is this meant to be humorous?!

Discord:
Oh, no, I haven't touched that one yet.

Lord Tirek:
There's a fourth? And you did not tell me this?!

Discord:
I just needed some assurance that you truly considered this a team effort. And now I have it.

Lord Tirek:
Then where can we find this fourth princess? Where is her castle?

Discord:
Castle? [laughs] No, Princess Twilight lives above a library in Ponyville. Castle? [laughs]

Lord Tirek:
Not for much longer.