This is how The Mane Seven vs. the Corrupted Worm goes in My Little Pony: Equestria Girls.
[The Mane Seven find themselves deep in the bowels of Thunderwing's fortress]
Twilight Sparkle: So these are the bowels?
Rainbow Dash (EG): Yep.
Pinkie Pie (EG): Are those tunnels?
Rarity (EG): It looks like something's down here with us.
Applejack (EG): But what could've dug these tunnels?
Fluttershy (EG): And fast.
Sunset Shimmer: I heard Thunderwing has a watchdog that guards the bowels of his fortress.
[They hear a noise and turn to see a Corrupted Worm pass by]
Sunset Shimmer: What was that?
Fluttershy (EG): Whatever it was, it can't be good.
Applejack (EG): Well I guess now we know who dug these tunnels.
Rarity (EG): The Corrupted Worm.
Pinkie Pie (EG): What's a Corrupted Worm?
Rainbow Dash (EG): [points to it] That!
Twilight Sparkle: It seems to be the watchdog of Thunderwing's fortress.
[The Corrupted Worm then shows up, ready to defend its master's fortress]
Corrupted Worm: I am Gor and I have protected my master, Thunderwing's fortress for over one thousand years.
Twilight Sparkle: Well, Gor, we're here for something Thunderwing has of mine.
Corrupted Worm: You wanna get to Master Thunderwing, you're gonna have to go through me first.
Twilight Sparkle: Whatever.
Rainbow Dash (EG): Just attack us already.
Pinkie Pie (EG): Go ahead.
Rarity (EG): Yeah.
Applejack (EG): We're waitin' for ya.
Fluttershy (EG): Bring it on.
Sunset Shimmer: Come on.
Corrupted Worm: Whatever you want here, you traveled a long way just to meet your defeat.
[The Corrupted Worm starts feeding on the the Dark Energon crystals all over the bowels to gain strength]
Twilight Sparkle: Now!
Rainbow Dash (EG): Nice trick.
Pinkie Pie (EG): Yeah.
Rarity (EG): Yeah.
Applejack (EG): Let's go!
Fluttershy (EG): Yeah!
Sunset Shimmer: Let's move while its distracted.
[The Corrupted Worm blocks their path]
Corrupted Worm: No one goes anywhere until they deal with me.