The Dreadnaught

You may be looking for Oryx's flagship.

The Dreadnaught is a story mission in Destiny. It takes place on the ship of the same name, and is the third mission in The Taken King.

Transcript
{Cutscene}

''Fade in to a view of the planet Saturn, its many surrounding rings, and the irreparable crater left by the Dreadnaught's superweapon; the Guardian's next target. Piloting Eris Morn's ship, they arrive within the debris field of the orbiting rings.'' ''The Guardian flies Eris' ship through the widespread wreckage. Pieces of both Hive and Awoken ships litter the area, a constant reminder of the massacre that took place.'' The camea cuts to the inside of the vessel, where the Guardian and Ghost look at each other. As they look ahead, the body of a dead Awoken soldier floats into view, further signifying the terrible blow dealt to the inhabitants of the Reef.
 * GHOST:(solemnly) It only took one blast from the Dreadnaught...
 * CAYDE-6: When you're through...it will never fire again.
 * CAYDE: Just don't forget to plant the transmat link so other Guardians can land.
 * CAYDE: Not everybody's got stealth tech...and a...ship that smells like Hive. Good luck, Guardian.

As the Dreadnaught comes into view, the ship briefly flashes a tint of yellow, before disappearing completely. ''The Guardian nods in silent apprehension. Suddenly, alarms within the ship start to blare, and a red light starts flashing in the cockpit. The Guardian's head jerks up in alert, and attempts to quell the situation, to no success.'' ''The ship loses its camouflage, directly in front of the Dreadnaught's firing chamber. The Guardian continues, too far to turn back.'' Almost immediately, the chamber starts to surge with energy; the weapon is charging. ''The Guardian rams their fist forward, thrusting the ship into top speed. The weapon continues charging, as the Guardian rushes toward a ledge near the chamber. As the Guardian approaches, the weapon finalizes its charging sequence and fires. The camera cuts to the inside of the ship, as the Guardian shield their face from the light of the weapon's fire. The screen briefly flashes white. The explosion destroys Eris' ship, killing the Guardian. Luckily, the Ghost manages to revive them on the ledge itself. They turn around and survey the damage.'' Fades out.
 * GHOST: Activating stealth drive.
 * GHOST: I'm picking up fluctuations in the power conduit.
 * CAYDE: Relax. I modified the tech myself! Probably just Saturn's radio storms running interference.
 * GHOST: It's malfunctioning!
 * CAYDE: Did you break my stealth drive?
 * GHOST: (whispers) You think they can see us?
 * GHOST: (panicked) I think they can see us!
 * CAYDE: What happened!? Everything allright?
 * GHOST:(sarcastically) Why wouldn't we be allright? We're just stuck here with no ship and no transmat zone.
 * CAYDE: Great! (smugly) Told you my stealth drive would work.

{Gameplay}

CAYDE: All right...I'd like to tell you the strength of the City is behind you, but as long as the Dreadnaught is still firing, we can't risk reinforcements. Head inside, see if you can find whatever's powering that weapon.

''The Guardian explores the large balcony, eventually coming across another floating light. It flees upon the Guardian's approach.'' ''The Guardian follows the light to a massive trench. The light sits atop the only bridge across. With a flash, the light disappears, taking the bridge with it.'' If the Guardian hesitates: ''The Guardian opens the Ghost, and its scan shows several pieces of a transparent bridge, crossing the gap to the other side. Using the Ghost, the Guardian navigates the platforms and continues exploring the ship. Eliminating a few Thrall along the way, the Guardian finds a small worm writhing on the ground. The Ghost investigates:'' The Guardian continues deeper inside, reaching a large section with several branching rooms. ''The Guardian comes across more invisible platforms, and uses the Ghost to illuminate them. They make it into a room swarming with Hive. In the center is a large pillar, containing an orb of energy.'' ''The Guardian uses the Ghost to destroy the spire's shield, and shoots the blight energy inside until it explodes. The lights in the room dim, and metal groans as the ship powering down is heard.'' If the Guardian makes their way across the center room, and the hallway across it, they will come across a medium sized platform. It appears to be an arena of sorts, and has two staircases converging on a large portal, which opens. ''A giant being steps out of the portal. It bears a shocking resemblance to Crota, the Hive god assassinated long ago. Accompanied by two Wizards, the creature, revealed to be Thalnok, Fanatic of Crota, attacks the Guardian.'' ''Either the Guardian leaves or attempts to engage the fanatic. If the Guardian tries the latter, their efforts are useless; it is clear this battle must be fought another time, and with greater numbers. Eventually, the Guardian finds another room with a pillar of energy. Following Cayde's advice, the Guardian takes down the shield and destroys the energy.'' ''The Guardian continues to another room, this time surrounded by Taken. When the Ghost attempts to disable the shield, it is immediately repaired; the Taken are defending the last level of Oryx's defenses. Once the Guardian eliminates them all, the Ghost is sent to dismantle the shield, and it remains powered down. The Guardian destroys the last energy blight. All the lights in the area shut off, and the weapon is heard shutting down.'' ''The Guardian discovers the exit, and finds a few Acolytes emerging from it. Quickly handling them, they reach the Hull Breach to find a massive Cabal carrier, permanently embedded into the Dreadnaught's architecture. Cabal, Hive and Taken are all fighting each other across the breach.'' The Guardian heads to the edge of the ship's cavity and plants a beacon in the ground. ''While waiting for their ship, the Guardian kills off Cabal and Hive.  Just as their ship arrives however, the hangar door to the Cabal carrier opens, and a Goliath emerges from inside, focusing fire on the Hive and the Guardian.'' The Guardian's ship is forced to retreat, the Goliath posing too much of a threat. ''A few seconds later, heavy ammo cases appear around the area. Using them, the Guardian destroys the Goliath.'' Their ship returns near the transmat zone. Mission ends.
 * GHOST: Same thing we saw right before Phobos fell apart. Might be some kind of probe, expect trouble.
 * GHOST: The bridge across just vanished!
 * CAYDE: Gimme a second...I'll check with Eris.(pauses) Uh...she says it's probably just a resonant spell...whatever that is, so just don't--don't trust anything.
 * GHOST: How about you let me out, and I'll take a look?
 * GHOST: According to the World's Grave, the Hive ingest those worms. Not for sustenance, but survival. Spores, moths and worms...All things Earth's ancestors believed grew from the dead. Just a thought.
 * CAYDE: Any luck with the weapon?
 * GHOST: We've only scratched the surface of the Dreadnaught.
 * CAYDE: Hive keep vital operations deep in the core of their architectures. You're going to have to get your hands dirty.
 * GHOST: That energy powers the weapon. Cayde, what do we do?
 * CAYDE: OK...hold on. Eris is going on about "breaking the necrotic...." (annoyed) Aw, just shoot it.
 * GHOST: Ah. There's a shield up. Let me take it down for you.
 * GHOST: Okay, it's down. I'm picking up other channels to the weapon.
 * CAYDE: Find them. It won't stop firing until you shut them all down.
 * GHOST: There's a stream of interdimensional energy concentrated within that field...growing stronger.
 * GHOST: ...and something just stepped out of it.
 * CAYDE: Stay on target--we need more Guardians on that Dreadnaught.
 * GHOST: The weapon's cycling down! Let's find another channel.
 * GHOST: The weapon's down! Cayde, what's our next move?
 * CAYDE: We need that transmat up and running. There's a massive hull breach near your position, that'll be your best bet.
 * GHOST: (surprised) A Cabal ship! Skyburners colors! It must have deployed from Phobos.
 * CAYDE: (confused) Cabal? We'll deal with them later. Secure that transmat zone!
 * GHOST: Activating transmat link! Our ship is inbound.
 * CAYDE: (proudly) Hey, Zavala! Wanna know what a transmat zone on The Dreadnaught looks like?
 * COMMANDER ZAVALA: (angrily) You landed a Guardian on the Dreadnaught without authorization?!?
 * CAYDE: Oh, right! (sarcastically) Can I have authorization??
 * ZAVALA: We'll discuss it later. Guardian, take care of that tank, or the transmat zone won't matter!
 * GHOST: I'll bring down some ammo crates from the ship--you're going to need them!
 * ZAVALA: Guardian...Cayde just briefed us on your....unorthodox mission. Your victory, no matter the method--is a Vanguard victory. You have our thanks.
 * CAYDE: Everyone loves a bad idea when it works. Now, excuse me Guardian, I have to go have an...uncomfortable conversation with Eris about...her ship. Get home safe.