Princess Luna: Tirek is set on possessing Alicorn magic. When he comes for us, we cannot have what he is looking for.
Twilight Sparkle: I'm more than willing to do my part and give up my magic.
Princess Luna: You misunderstand. Our magic cannot just disappear into thin air. Somepony must keep it safe.
Princess Cadance: That somepony is you, Twilight.
Twilight Sparkle: Why me?
Princess Celestia: We do not believe that Tirek is aware that a fourth Alicorn princess exists in Equestria. If we transfer our magic to you, Tirek will not know where it has gone.
Princess Cadance: Do you understand what we're asking of you?
Twilight Sparkle: Yes. It's just... I'm only now learning how to control my own Alicorn magic. To take on even more–
Princess Cadance: Twilight, you represent the element of magic. If there is anypony who can do this, it's you.
Twilight Sparkle: Taking on this task will be one of the most difficult things I'll ever do, but with the help of my friends–
Princess Celestia: I'm sorry, Princess Twilight, but you must keep your new abilities a secret. I fear that your friends being aware of your new power could put them at great risk. Do you still think you can take on this responsibility?
Twilight Sparkle: This is the role I am meant to play as a princess of Equestria! I will not fail to do my duty!
Princess Celestia: Then we must begin at once.
[magic noises]
[wibbling noise]
Discord: [shivers] That can't be right.
Lord Tirek: What can't be right?
Discord: Nothing. Carry on.
[magic humming]
Princess Celestia: [out of breath] It is done.
[owl hoots]
Spike: [snoring] You weren't gone very long. Does that mean everything's okay?
Applejack: Jumpin' junebugs, Twilight! When did you learn to fly that fast?
[electricity crackles]
Twilight Sparkle: I must have caught a particularly strong breeze... or something.
Rainbow Dash: Must have been "or something", because there wasn't any breeze up there.
Twilight Sparkle: I don't know what happened, but I don't really have time to figure it out right now.
[electricity crackles]
Rarity: Another visit to the Castle of the Two Sisters, I presume? We'd be more than happy to accompany you!
Twilight Sparkle: Not today!
[electricity crackles]
Twilight Sparkle: Tirek may still be a threat. I need you all to stay here and encourage everypony to remain inside.
Lord Tirek: Getting rid of your magic so that I cannot take it from you? That was your plan? How does it feel, knowing that soon, every Pegasus, unicorn and Earth pony will bow to my will, and that there is nothing you can do to stop it?
Princess Celestia: You will not prevail, Tirek.
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– 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.
Applejack: All right, y'all. I think we've warned everypony to stay inside.
Fluttershy: I'm sure Discord will catch Tirek and this will all be over soon.
Rainbow Dash: I'll bet he takes his sweet time.
Discord: Or perhaps these things just take time.
Fluttershy: [gasps] You're back! Did you bring the cucumber sandwiches?
Discord: I did. I imagine they'll be your last decent meal for quite some time.
[magic zap]
Main cast bar Twilight: [various exclamations]
Discord: Ta-da!
Lord Tirek: You've gathered up all of them?
Discord: And her little dragon, too.
Spike: [chomps]
Fluttershy: [crying] Why are you doing this? I thought we were friends!
Discord: Oh, we were. But Tirek offered me so much more than just tea parties. Surely you saw this coming.
Fluttershy: [crying] I didn't. I really didn't.
Lord Tirek: [inhales]
[thud]
Lord Tirek: You really think she'd do anything for them?
Discord: If Twilight has magic to give, it will be yours. Soon there won't be a Pegasus, Earth pony or unicorn who will be able to stand up against us.
Lord Tirek: Us? Who said anything about us?
Discord: You did.
Lord Tirek: You've helped me grow strong, you've provided the means by which I can obtain Princess Twilight's magic, and now you are no longer of any use to me.
[magic noises]
Discord: [weakly] But you said this was a sign of your gratitude and loyalty. A gift from someone close to you.
Lord Tirek: My brother who betrayed me. It is as worthless as he is.
Lord Tirek: You have something that belongs to me!
[thud]
Lord Tirek: You're going to give me what I want! [inhales]
[teleporting zap]
[explosion]
Twilight Sparkle: [screams] [gasps]
[magic noises, explosions]
Lord Tirek: Now I understand what your fellow princesses have done!
[magic noises]
Lord Tirek: [roars]
Twilight Sparkle: [screams]
[distant thud]
Lord Tirek: [roars]
[crunching]
[magic noises, Tirek roaring in rage]
[explosion]
Lord Tirek: It appears we are at an impasse. How about a trade, Princess Twilight? Their release for all the Alicorn magic in Equestria.
Twilight Sparkle: [gasps]
Rest of main cast: [shouts of protest]
Lord Tirek: What's it going to be, Princess?
Rainbow Dash: [muffled] Don't do it, Twilight!
Fluttershy: [muffled] We aren't worth it!
Discord: [muffled] Oh, but you are, Fluttershy. You're the pony that taught me that friendship is magic. I had magic and friendship, and now I don't have either.
Lord Tirek: Enough! I want an answer, and I want it now!
[long pause]
Twilight Sparkle: I will give you my magic, in exchange for my friends.
Rest of main cast: [gasps]
Lord Tirek: As you wish.
[bubbles popping]
Twilight Sparkle: All of my friends.
Lord Tirek: After the way he has betrayed you, you still call him a 'friend'?
Discord: Tirek tricked me into believing that he could offer me something more valuable than friendship. But there is nothing worth more. I see that now. He lied when he said that this medallion was given as a sign of gratitude and loyalty. But when I say that it is a sign of our true friendship, I am telling the truth.
Applejack: You think that might be the last one we need?
Twilight Sparkle: We have to get to the chest.
[various crunching]
Twilight Sparkle: Together! I think we have to do this together!
[keys turning]
Main cast: [gasps]
[magic noises]
Lord Tirek: How is this possible?! You have no magic!
Twilight Sparkle: You're wrong, Tirek! I may have given you my Alicorn magic, but I carry within me the most powerful magic of all!
Lord Tirek: [screaming]
[Cerberus growls]
[many magic noises]
Rarity: Sweet Celestia! Are you all seeing what I'm seeing?
Twilight Sparkle: But... whose is it?
Princess Celestia: I believe it is yours, Princess Twilight.
Princess Celestia: You've been wondering what you are meant to do as a princess. Do you know now?
Twilight Sparkle: As princess, I believe I have the power to spread the magic of friendship across Equestria. That is the role I am meant to have in our world! The role I choose to have! But I didn't defeat Tirek on my own – it took all of us to unlock the chest!
Princess Celestia: Then it is unlikely you are meant to take on this task alone.
Main cast: [gasping in awe]
Pinkie Pie: Wowee!
Princess Celestia: You are now Twilight Sparkle, the princess of friendship. But what is the princess of friendship without her friends?