Finish the Order of Zildrog story from Odessen. Investigate the listening post, enter the unique [SOLO-STORY] Nathema instance, trigger the Voreclaw floor traps, keep Hunter Probes alive to disable the Guardian Droid and break Gemini 16's four Crypt of Essence links before fighting Vinn Atrius.
Mode and story notes: One-time Traitor Arc mission at level 70+ uses [SOLO-STORY] Nathema Conspiracy and unique cutscenes. Repeatable [STORY] solo is also available at 70+, Veteran Group Finder 70–80 and Master Group Finder 80. Repeatable [STORY] does not complete the one-time Traitor Arc finale.
01
First finish KOTFE and KOTET
The linked TRAITOR ARC follows Knights of the Fallen Empire and Knights of the Eternal Throne. At level 70+ complete their story, then begin THE FORGOTTEN WORLD / WAR ON IOKATH from the ship's glowing blue story terminal or ERAS window.
02
Follow the correct Traitor Arc story chapter
Use the purple mission tracker instead of launching a repeatable [STORY] Flashpoint by itself. The sequence runs WAR ON IOKATH → CRISIS ON UMBARA → A TRAITOR AMONG THE CHISS → THE NATHEMA CONSPIRACY.
03
Return to Odessen's Alliance Staging Room
Travel to ODESSEN or use LAUNCH MISSION. On the OUTSIDE PLATFORM EAST of the Alliance base, take the elevator DOWN to ALLIANCE STAGING ROOM, then follow the purple story marker.
04
Do not select ordinary repeatable Story for the first run
The one-time Traitor Arc instance has dedicated cinematic story progression and its own mission. The repeatable [STORY] quest from a nearby terminal can be completed separately but does not replace the one-time arc.
05
Finish Umbara and Copero
Complete the ONE-TIME CRISIS ON UMBARA and A TRAITOR AMONG THE CHISS chapters. The story then grants THE NATHEMA CONSPIRACY on Odessen.
06
Meet Lana in Odessen's Staging Room
Use the outside eastern platform elevator DOWN to ALLIANCE STAGING ROOM. Speak to LANA BENIKO and use the mission LAUNCH control.
07
Work through the listening post
The story first sends you to RESTORE POWER, INVESTIGATE ACTIVE TERMINALS, INVESTIGATE THE MAIN TERMINAL and ESCAPE THE LISTENING POST. Follow the purple objectives before looking for Nathema's main instance.
08
Accept the one-time [SOLO-STORY] instance
After the Theron dialogue and listening-post sequence, the story automatically grants [SOLO-STORY] THE NATHEMA CONSPIRACY. Enter via the active mission door. Do not use the nearby repeatable terminal instead.
09
Repeatable version is a different mission
At 70+ the Odessen ALLIANCE STAGING ROOM Flashpoint terminal offers [STORY] replay; Activity Finder → SOLO → THE NATHEMA CONSPIRACY → TRAVEL also replays. Neither replaces the one-time story instance.
02 · OBJECTIVE-BY-OBJECTIVE WALKTHROUGH
Where to go and what to click next
01
Make your way to Zildrog Encampment
Start on NATHEMA and follow MAKE YOUR WAY TO THE ZILDROG ENCAMPMENT along the marked exterior path, clearing guards that block progression.
02
Defeat the Voreclaw
Lure the VORECLAW near a GREEN CIRCLE and RIGHT-CLICK THE GLOWING BLUE TERMINAL to shock and stun it. Clear additional smaller creatures as needed.
03
Avoid the burrow
When Voreclaw goes underground inside a BIG RED CIRCLE, step out. The blue terminal may be used to force it back out if timed properly.
04
Get to Verdant Valley
After the Voreclaw follow GET TO VERDANT VALLEY. A little later, the path requires RIGHT-CLICKING A HIGHLIGHTED ELEVATOR BUTTON; it may be easy to walk past.
05
Proceed through the encampment
Continue to the Verdant Valley's route through Order of Zildrog defenders. Optional HERALD/HAND OF ZILDROG are off the main path and can be skipped.
06
Reach the Temple
Follow the mission marker to REACH THE TEMPLE. Use the correct door activation rather than searching for a shuttle back to the Alliance base.
07
Open the Door to the Temple
When the objective updates, RIGHT-CLICK THE HIGHLIGHTED TEMPLE DOOR CONTROL to open the next arena.
08
Defeat Ancient Guardian Droid
DO NOT DESTROY THE HUNTER PROBES. Bring the Guardian near a probe and damage the probe to ABOUT HALF HEALTH; its discharge stuns/weakens the boss.
09
Hide behind the Hunter Probe during lasers
When the Guardian moves toward the CENTER and SPINS ITS LASER, shelter behind an intact Hunter Probe. Do not let your companion destroy all probe cover.
10
Locate Order of Zildrog leaders
After the Guardian, follow LOCATE THE ORDER OF ZILDROG LEADERS into the final chambers.
11
Defeat GEMINI 16: avoid blue beam
In Story Mode STEP OUT OF THE BLUE BEAM. In Veteran Mode the beam can track a player; use a defensive cooldown or line-of-sight pillars.
12
Manage Skytrooper waves
Four Skytroopers appear at a time. Clear THREE AND LEAVE ONE ALIVE when safe to prevent repeated four-trooper waves, then focus Gemini.
13
Break Gemini's four Crypt links
When FOUR GEMINI CLONES appear, each is connected by a YELLOW BEAM to a CRYPT OF ESSENCE ALONG THE ARENA WALL. ATTACK THE LINKED CRYPT (it may have no nameplate), then defeat that unshielded clone. Repeat for all four.
14
Shut down the Zildrog Console
After the Gemini phase follow SHUT DOWN THE ZILDROG CONSOLE. The terminal/computer is an actual required damage or interaction target, not another character to speak to.
15
Defeat Vinn Atrius
Stay away from the arena edge to avoid knockbacks. Move out of BLUE CIRCLES and destroy the GLOWING FLOATING GOLDEN TRIANGULAR ANNEX when it appears.
16
Stay close during Lifeforce Shackles
If a RED SHACKLE LINK connects two players or you and companion, MOVE TOWARD EACH OTHER until the line turns GREEN. Remaining apart heals Vinn, potentially to full.
17
Attack the Zildrog computer afterward
After Vinn dies, TARGET AND ATTACK THE COMPUTER/ZILDROG CORE if still required. It can be awkward to target; moving closer to a corner may help.
18
Return to Lana in the Alliance Staging Room
Exit only after the final objective resolves and follow the outer THE NATHEMA CONSPIRACY mission back to LANA on ODESSEN.
19
Verify Traitor Arc completion
Check the mission tracker for the completed Nathema chapter before starting the next expansion era; a repeatable [STORY] run does not retroactively complete it.
Optional activities: Seeker of Fortune bonus: SEVEN HIDDEN TREASURE CHESTS throughout Nathema, available in all modes, awarding decoration choices. Herald/Hand optional boss requires no unlock. The Hunter Probes are required encounter tools, not targets to eliminate.
03 · COMBAT TROUBLESHOOTING
Boss mechanics without guessing
These descriptions cover the relevant objective, visual warning, controls and known failure points. Optional bosses are labeled and do not block the mandatory story.
By Imperial Dark Sector
ENCOUNTER 01 / 05
Voreclaw
Where: First outdoor Zildrog encampment boss.
01
Bring it onto a green trap
Tank or lure the boss inside one of the GREEN CIRCLES.
02
Activate blue trap terminal
RIGHT-CLICK the associated BLUE TERMINAL to shock/stun it.
03
Survive the burrow
On its large RED UNDERGROUND CIRCLE, step out and manage spawned smaller enemies.
04
Continue toward Verdant Valley
After victory look for the needed ELEVATOR BUTTON on the path.
Stuck here? If the Voreclaw is taking forever, try the GREEN CIRCLE + GLOWING BLUE TERMINAL stun mechanic.
Why can't I use the usual [STORY] mission to advance Nathema?
The one-time Traitor Arc requires [SOLO-STORY] THE NATHEMA CONSPIRACY after the ODESSEN LISTENING POST objectives. Repeatable [STORY] is a different instance.
These are published source guides with game-client imagery. IDS does not claim to have personally entered the current client or reproduce unlicensed screenshots. Controls and difficulty rules may change after patches.
