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Polyphony is a Lore book added in Episode: Echoes.
I. Impact
! IMPACT AFT FUSELAGE !
The alert roused Failsafe from power-saving mode. She reflexively brought the lights up to full, engaged the warning system, and sent a request for complete Exodus Black system information.
"Generating status report, Captain," she said blearily as her optics flickered to life, displaying the empty catwalks and canted wreckage around her mainframe.
"Oh," she said. "Right."
Failsafe canceled the system information request and dismissed thousands of prompts to connect to a navigation network that hadn't existed for centuries. She took a deep draw of reserve power to clear her head—! LOW POWER ALERT: 4% ! —and activated her external optics.
She scanned the available channels. The hull integrity system remained linked to her mainframe, despite most of the Exodus Black itself being scattered over a vast debris field.
! INTEGRITY: 0% !
She ignored the centuries-old warning and focused her aperture on motion along her periphery: a group of Fallen Vandals was prying the plating from a distant section of her crumpled fuselage.
"Will my suffering never end?" Failsafe groaned halfheartedly to herself.
She scanned the nearby area for Guardian activity—nothing. She wasn't surprised; it had been a while since a Guardian had done much more than stop by to ask if she knew where Xûr was.
She would have to fend for herself. Failsafe scrolled through her available systems.
Defense Systems: ! OFFLINE !
Energy Shielding: ! OFFLINE !
Automated Turrets: ! OFFLINE ! (How long had it been since she had working turrets? 300 years? 400? She could barely remember.)
Magnetic Barrier: ! COMPROMISED !
Cargo Winch: ! COMPROMISED !
Communications: ONLINE
A handful of Fallen weren't worth a distress call to the Vanguard. If she called the Tower every time the locals scavenged nanotite tubing from her wreckage, they'd revoke her comms access…
The comms system!
Failsafe spun up a deep-space broadcast and prepared to send a message into the empty space 21… no, 23 degrees off from Ganymede. A communications dish on what was once the starboard side of the Exodus Black creaked into position, reflecting a hazy patch of light down onto the Vandals as it locked into place—a devious stratagem that would increase the ambient temperature by as much as 3 degrees Celsius over the next 20 minutes.
"Burn and die," Failsafe hissed quietly, while the Vandals did no such thing.
As she disabled the external optics with a defeated sigh, a small icon on her status feed grabbed her attention.
A new message!
Failsafe opened the communication ravenously, and it was only with moderate disappointment that she realized it was a text-free request: Ada-1 was seeking access to the Exodus Black's old shader archive.
She should at least reply, Failsafe figured. She sighed internally and routed power toward the dusty rack housing her array of socialization filters and etiquette protocols. She winced as currents crackled across the worn cables—! LOW POWER ALERT: 4% !—but soon an ancient platter drive whirred to life.
Failsafe initiated a response. "Hey," she dictated. "Yeah, if you want to help Guardians play dress-up, you can have some of my old stuff."
Her filter happily translated Failsafe's thoughts into a form it calculated was more acceptable to the recipient.
"Bonjour, Ada-unit!" the filter typed cheerfully. "Your dedication to Guardian aesthetics is quite commendable! Your request has been approved! ^_^"
As Failsafe reviewed the polished words, her processer made a dissatisfied grinding noise. She overrode the protocols and manually deleted the carets and underscore, then the exclamation points, then the patronizing greeting.
She paused, deleted the rest of the message, and instead approved Ada's request without comment. The bright 1 on her status feed changed to a gray 0, aligning perfectly with the burn-in on the screen.
! IMPACT AFT FUSELAGE !
The Vandals were doubtless going after another piece of plating. "Procreate!" Failsafe heard herself say brightly, and she realized she was still powering her protocol banks. She rerouted the energy toward her external optics.
The Vandals had indeed moved on to another fragment of her ruined hull. She saw them pull a piece of her ceramic insulation aside and begin savaging the wiring underneath. Suddenly they stopped, their gazes fixed on the sky.
! OBJECT APPROACHING !
A flash of bright light blinded Failsafe's feed—
!!! LOCALIZED IMPACT !!!
An object struck Nessus's surface at incredible speed and a series of tremors rattled Failsafe's weathered stabilizers. The planet fell eerily quiet for a long moment.
Now this, Failsafe thought, might be something worth calling in.
II. Isolated Incidents
[Report excerpts by VanNet encrypted router.]
LOCATION: NESSUS()
KEYWORDS: VEX;NECK;COLLAR;MANTLE;YOKE;HARNESS
INCIDENT REPORT 29
LOCATION: WELL OF FLAME
"I had a Hobgoblin in my sights, but some weird lights around its neck distracted me. The thing must've caught a glint off my optics because it looked right at me. Instead of opening fire, it juked backwards and ran. I've never seen a Vex run before, and honestly, I was so surprised, I missed my shot. I lost track of it by the radiolaria pools near the Well of Flame."
INCIDENT REPORT 171
LOCATION: ARTIFACT'S EDGE
"Saw a big ol' Vex Minotaur hanging out in the shallows. It was far downrange, but it looked like it was leaking data or something from its neck. I fired before my Box Breathing kicked in, so it wasn't a kill shot. It looked back at me, then it popped its own juice box and dumped itself into the radiolaria. Definitely creepy, but I guess it's a good way to make a clean escape."
INCIDENT REPORT 2507
LOCATION: WELL OF FLAME
"One of those sleek Precursor models was leading a group of normal Vex Goblins. The Goblins all had glowing collars, but the Precursor didn't. They were moving in a regimented military structure. One of the Goblins stepped out of formation, and the lead Precursor glared at it. I've never seen a Vex break formation… didn't even know they could do that."
INCIDENT REPORT 4852
LOCATION: VIRGO CONDUIT
"My fireteam was ambushed by three Minotaurs and a group of Hydras a bit outside of the Well of Echoes. I noticed they had collars of light radiating out from them, and we'd heard to keep an eye out for those things, so we were taking the fight slowly. The Minotaurs were being really defensive, staggering their shields to cover each other. If you've ever gone up against a team of Titans in Crucible, it was like that. Eventually our Hunter went down to some stray Hydra fire, and the moment her Ghost appeared to rez her, the Minotaurs charged in. I swear they were trying to go after her Ghost. Took all we had to fight them back. You told us to report any aberrant behavior, so there you go."
INCIDENT REPORT 8506
LOCATION: WATCHER'S GRAVE
"I was running a patrol on Nessus when I saw some Vex with glowing symbols on their necks. They were trying to activate one of their big portals. Suddenly it turned on, and a bunch of other Vex came out. The first Vex looked surprised and beeped at each other or whatever. Then both groups opened fire! The necklace Vex were wiped out and the others ripped the radiolaria cores from the bodies and took them back through the portal—or they would have, if I hadn't Thundercrashed the whole group."
INCIDENT REPORT 7210-A3
LOCATION: THE CISTERN
"Cleared a group of Vex crouched around the base of a milk waterfall. Saw them clearly before I engaged: some Precursors mixed in with Nessus Vex. Nessus ones had the glowing mantles from the reports, but the Precursors didn't. Anyway, when I moved in to make sure they were dead, I saw little model buildings in the dirt. I'm telling you, they'd been building sandcastles."
INCIDENT REPORT 2447-C1
LOCATION: POOLS OF LUMINANCE
"I was up on a ridge collecting Datalattice for Rahool and I spotted a single Vex Hobgoblin below, just watching me. At first, I thought it was damaged because it had a bunch of bright interference around its neck and it was moving funny, like its suspension was loose. Right as I was about to draw, the Hobgoblin waved its hand at me. I figured it was signaling an ambush and I looked around, but it didn't have any backup. It waved again, and I gave it a little wave back—I didn't see the harm. Well, it got real excited at that and waved with both arms. But then a Titan came speeding past on their Sparrow, hopped off, and blasted it to hell with their Palmyra-B. Probably thought they were doing me a favor."
INCIDENT REPORT 124-K7
LOCATION: ARTIFACT'S EDGE
"I was passing through that dark wooded area just northeast of the LZ, and I saw something shining in one of the big trees. I got closer and saw a Vex Goblin with something glowing around its neck. It was creeping through the branches and making a little noise—almost like it was laughing, if that makes sense? I threw a Storm Grenade up there and I'm pretty sure I got it, but I couldn't see for sure. I thought I should report it anyway."