This is how Discovering the Dark Energon gem goes in My Little Pony Transformers Prime: The Movie.
[Sunset runs ahead of Arcee and Knock Out]
Sunset Shimmer: Come on! Hurrry!
[The two bots stop to catch their breath]
Arcee: Will you slow down?
Knock Out: We're going as fast as we can.
Sunset Shimmer: Well, you need to go faster.
[The two bots continue running]
[Sunset notices a dark purple glow]
Sunset Shimmer: Follow me.
[They run towards a crater in the ground and find a glowing dark purple gem in the middle of it]
Knock Out: What is that?
Sunset Shimmer: I don't know.
[She climbs down into the crater followed by Knock Out]
Knock Out: Easy, Sunset. It could be dangerous.
Sunset Shimmer: I'll be fine, Knock Out.
[Suddenly, something in Knock Out's mind clicks and he pulls her away]
Knock Out: Come away!
Sunset Shimmer: Why? What's wrong?
Knock Out: That is a Dark Energon gem.
Sunset Shimmer: What does it do?
Knock Out: It has the ability to bend one to the user's will. It is empowered by other gems that gather magic.
Sunset Shimmer: So the more magic these gems collect, the more powerful the gem becomes?
Knock Out: Yeah.
Sunset Shimmer: We'd better get the others out here.