A sealed door deep within Operation: Seraph Station hides one of Destiny 2’s most elusive secrets. Here’s how to reach it, what to bring, and how the Security Drones and Triumphs tie into breaking through its defenses.
In this guide we’ll tell you how to unlock this metallic companion and unlock the Guardian’s Best Friend Triumph, which you’ll need for Season of the Seraph’s Title and Seal.
How to open the door
To open the locked door in Operation: Seraph Station, you first need to collect all the Security Drones scattered across various destinations and missions linked to the Warmind nodes. Once every drone is destroyed using the Revision Zero Exotic Pulse Rifle, the secret area becomes accessible. After this, return to the station during the Heist Battlegrounds or the Seraph’s Shield mission, and the door that was previously sealed will now slide open, revealing hidden loot and triumph progress.
Once you’ve finished the “Operation: Seraph’s Shield” mission and crafted your very own Revision Zero Exotic pulse rifle, you’ll be able to adventure around and destroy the 50 Security Drones on the Moon, Europa, and Mars. Then, as you progress further in the mission and unlock more upgrades, you’ll be able to destroy the final 12 Drones inside the “Operation: Seraph Shield” mission itself. (If you need help finding any of those Drones – and some of them are pretty tricky – don’t worry, we’ve run down the location of every Security Drone in Destiny 2.)
Once you’ve destroyed all the Drones with Revision Zero, you’ll need to make your way back through “Operation: Seraph Shield,” through the space walk, and into the room where you finally defeat the giant Hive Knight. (If you take the red teleporter to the final boss, you’ve gone too far.)
In the room where you kill the first boss (not to be confused with the room where you make that same boss retreat earlier in the mission), you’ll see a door on the left with a bunch of elaborate lights and a probe symbol on it. Once the Drones are destroyed, you’ll be able to unlock the door. Use your upgrades (or a sword with Eager Edge) to bypass the lasers and the locked door in order to reach the teleporter.
How to get the dog and what you get once you reach it
Head to the eastern side of Seraph Station’s main chamber after disabling the security drones. Activate the hidden console behind the debris pile to spawn the golden-frame dog enemy. Defeat it quickly before it flees, then loot the chest that appears for the Seraph Station Triumph and a powerful exotic engram containing the Operation: Seraph Station weapon.
Once you go through the teleporter, you’ll find yourself in the dark corners of the station. You’ll have to complete a brief platforming puzzle with a few different routes, some of which will kill you while others will teleport you back to the beginning.
However, if you’re not a jumping puzzle person, the only thing you really need to know is to follow the right path once you reach the pipe junction and watch out for the red lights. Red lights tend to denote pits that can kill you, while white lights show the safer path. (If you want an exact run-through of how to reach the dog, check out the great video from Esoterickk we’ve linked above.)
Once you reach the mechanical dog, give him a little path and you’ll unlock the Guardian’s Best Friend Triumph. Even better, he’ll teleport to the HELM and hang out in front of the Exo Frame. You can pet him whenever you want and even select a tracker on your seasonal emblems denoting how many times you’ve pet the dog.
Typically, seasonal content like Operation: Seraph Shield disappears when Bungie rolls over to a new expansion year. With Lightfall coming out on Feb. 28, it’s currently unclear what will happen to the mission or the dog in early 2023. We’ve reached out to Bungie to clarify how the HELM will change post-Lightfall. To be safe, we highly recommend you get Revision Zero and the mechanical pup before Feb. 28, 2023.
Where to find all 50 Security Drones on Moon Europa and Mars
Security Drones in Destiny 2’s Season of the Seraph are collectibles destroyed with Revision Zero’s catalyst to unlock secrets like the locked door in Operation: Seraph’s Shield. They total 50 across locations, with 10 each on the Moon and Europa overworlds (20 combined), plus others in Heists and the mission itself.
Europa Drones (10 Total)
These span patrol zones and Lost Sectors; no upgrades needed.
-
#1 (Beyond): Top of the central Ziggurat/darkness structure from fast travel.
-
#2 (Asterion Abyss): High on the top-left wall/crack near open flat area.
-
#3-6: Scattered in zones like Eventide Ruins, Cadmus Ridge (e.g., #7 in Bunker E15 jailbreak room stairs; #9 floating by Deep Stone Crypt; #10 by Perdition chest).
-
Heist Battlegrounds: Europa (6 more, #11-16): Bray Exoscience entrance/outside, reception ceiling, hallway crate post-combat, etc.
Moon Drones (10 Total)
Focus on Sorrow’s Harbor (3), Hellmouth (3), Archer’s Line (2), Anchor of Light (2).
-
#17 (Sorrow’s Harbor): Eastern ledge/cliffside overlook from spawn.
-
#18: Above Pit of Heresy entrance in Scarlet Keep.
-
#21 (Hellmouth): Atop satellite tower by K1 Crew Quarters entrance; #22 inside during pre-boss jump.
-
#25-26 (Anchor of Light): Top of western tower; by crashed Ketch/Vex east side.
-
Heist Battlegrounds: Moon (6 more, #27-32): Right of first Cryptolith (Archer’s Line), pre-slide structure, etc.
Mars Drones (Heist Battlegrounds Only, 6 Total #33-38)
Launch from Throne World Director; early mission focus.
| Drone | Location |
|---|---|
| #33 | Far right of Escalation Protocol Tower A, behind boxes |
| #34 | Between Towers B/C on dirt path south |
| #35 | BrayTech ceiling in ghost defense |
| #36 | Catwalks back right |
| #37 | Platforming floor 2 ceiling (cover from tower) |
| #38 | Pre-vault room, top-right above wall |
Track progress in Triumphs tab; revisit zones via Director. Full 50 unlocks the dog pet and door.
How to get Revision Zero exotic weapon
Revision Zero is an exotic pulse rifle from Destiny 2’s Season of the Seraph, essential for destroying Security Drones and accessing features like the locked door in Operation: Seraph Station.
Quest Steps
Start by completing prerequisite story missions: the weekly “More Than a Weapon” Operation, then pick up “The Hidden Shape” exotic quest from the Holoprojector at the HELM. Launch and finish “Operation: Seraph’s Shield” exotic mission (first time on any difficulty) to get the Deepsight version from the final chest.
Crafting Unlock
Extract the pattern by completing a Deepsight Resonance on the weapon (via gameplay or dismantling extras), then shape a new one at Mars’ Relic Enclave-requires prior Witch Queen crafting unlocks like “The Arrival” and shaping quests. Level Hunter’s Trace intrinsic (via mission repeats or kills) to customize barrels, magazines, perks (e.g., Moving Target, Vorpal), and stock.
Current Access (2026)
Run Operation: Seraph’s Shield from the exotic mission rotator in the Director (weekly schedule; check in-game for current week) on Normal for the initial drop, then farm Legend for patterns/catalysts. Catalysts (Frenzy, Under Pressure, Outlaw, 4-Timer) come from time-gated “Should You Choose to Accept It” quests tied to weekly Operations and Legend runs.
