This is how Legend of the Dark Sparkle and Discovering the Dark Sparkle vault goes in My Little Pony: When Humans and Ponies Collide.
[We see The Element of Magic on a black screen]
Optimus Prime: (voice) The Element of Magic, the most powerful Element of Harmony, grants the wielder the wisdom of friendship and harmony.
[We see a statue of Starscream holding the Dark Sparkle]
Starscream: (voice) But for every force in the universe, there is an equal and an opposite. For every matter, an anti-matter.
[We see the Dark Sparkle on a black screen]
Optimus Prime: (voice) Legends speak of the Dark Sparkle: the antithesis to the Element of Magic.
Starscream: (voice) Where the Element of Magic gives the wielder friendship control, the Dark Sparkle empowers its wielder to bend the very fabric of the universe and its inhabitants to their will.
[We see Equestria]
Optimus Prime: (voice) This is our darkest hour. Equestria is nearly saved and victory is within the Autobots' grasp.
Starscream: (voice) This is our finest hour. Equestria has nearly mine and the Decepticons are on the verge of defeat.
[My Little Pony: When Humans and Ponies Collide]
[We see Hardshell and Sharpshot flying through a corridoor in insect mode]
Hardshell: The gates of Tartarus lay beyond this chasm.
Sharpshot: Tell me, Hardshell. Do you believe this "Dark Sparkle" even exists?
Hardshell: I don't believe, Sharpshot: I hypothesis. My conclusion is not yet form but all data leads us here.
Sharpshot: Are you certain?
Hardshell: Of course.
Soundwave: Conversation irrelevant. Danger imminent.
Sharpshot: For once we agree, servalience officer.
Starscream: [on comm] Hardshell, report.
Hardshell: Lord Starscream, we gained access to the place known as Tartarus.
Sharpshot: What's so important about this thing that we have to trace through and get?
Starscream: [on comm] Do you have a desire to cease functioning, Sharpshot?
Starscream: [on comm] You're great and your power is only matched by your incompetence. Now cut the static and bring me the Dark Sparkle!
Soundwave: Affirmative, Lord Starscream.
Starscream: [on comm] And Sharpshot, don't question me again.
[They go on]
Hardshell: You can be quite short sighted, Sharpshot. You see peril, where I see proof. The Dark Sparkle is here.
Soundwave: Tracing condiments. Four terminals control access. Simultaneously upload of keys required.
Sharpshot: A pity then, that we are only three.
Soundwave: Laserbeak, eject.
Sharpshot: My mistake, three and a half.