The Hidden War should advance according to player decisions and campaign events rather than a fixed session count.
Franz may escalate the conspiracy when:
A major cell succeeds
An Architect is exposed
The party discovers a wider connection
The Black Crusade draws closer
A pylon site is damaged
Imperial factions begin fighting
The players ignore an important operation
A dramatic shift would create meaningful choices
Escalation should reflect what has already happened.
At first, the conspiracy appears as unrelated local problems.
Examples include:
Stolen supplies
False orders
Missing officials
Strange cargo
Minor cult activity
Contradictory prophecies
Pylon fluctuations
Suspicious mercenary contracts
Unusual xenos movements
The party should be able to solve these immediate problems without understanding the larger design.
Early victories still matter. They remove assets the Sigil would otherwise use later.
The players begin finding evidence that separate incidents share the same source.
They may discover:
Matching cargo seals
Repeated phrases
Identical clerical errors
Agents serving different cells
Blackstone fragments moving between worlds
Orders with impossible dates
Rival warbands seeking the same device
The first confirmed Fractured Sigil symbol
At this stage, the party can begin predicting operations rather than only reacting to them.
The Sigil recognizes the party as a serious threat.
The conspiracy may respond through:
Assassination attempts
False accusations
Framed evidence
Attacks on allies
Compromised patrons
Rival quest-givers
Prophetic warnings
Offers of cooperation
Deliberately sacrificed cells
Attempts to divide the party
The Architects should not simply send endless enemies.
They should use political influence, uncertainty, and faction conflict to isolate the characters.
The final stage begins when the Sigil attempts to alter the Cadian pylon network during the larger invasion.
The operation may require:
Several active pylon sites
A blackstone control device
Coordinated Warp rituals
Manipulated military movements
Psychic or astropathic energy
Sacrifice of selected individuals
Simultaneous actions at distant locations
A conflict intense enough to create many possible outcomes
The finale may occur before, during, or after the main siege of Cadia.
One of the first major revelations should be that the Fractured Sigil is not united.
Different Architects want different futures.
This gives the party several options:
Exploit rivalries
Support one faction temporarily
Feed false information
Encourage premature conflict
Trade one operation for access to another
Turn a lesser Architect against the inner circle
Temporary cooperation should remain dangerous.
An Architect may honor one agreement while manipulating its consequences.
The Sigil benefits from the Thirteenth Black Crusade but does not control Abaddon.
Its agents use the invasion to generate military pressure, Warp instability, fear, and access to the pylons.
If Black Legion commanders discover this, they may attack the Sigil or seek to seize its work.
This can produce a temporary alliance of convenience between the party and a Chaos faction.
Such cooperation should create consequences, not erase hostility.
The conspiracy does not simply intend to destroy the pylons.
Its true goal is to redirect their influence and use the network to shape the boundary between realspace and the Warp.
This revelation should change the campaign’s priorities.
Destroying a pylon may stop one ritual while helping another Architect. Activating one may save a region while endangering psykers or awakening Necron systems.
A trusted ally, patron, or recurring NPC may have unknowingly advanced the plan.
They might have:
Authorized a shipment
Protected an infiltrator
Suppressed evidence
Followed a false prophecy
Repaired corrupted machinery
Sent the party on a manipulated mission
The character need not be evil.
Revealing that they were deceived can create guilt, mistrust, redemption, or political danger.
One Architect may claim that the player characters were predicted.
This should not mean their choices were predetermined.
The prophecy may have identified:
Their backgrounds
Their arrival at a location
A choice with several possible outcomes
The presence of one race or faction
A person carrying a particular relic
The prediction should be incomplete.
The party’s freedom lies in how they respond and which future they create.
The complete Sigil may function as more than a faction symbol.
Depending on the campaign, it may be:
A pylon activation sequence
A map of hidden control sites
A code that opens a blackstone vault
A daemonic binding pattern
A model of possible futures
A Necron command interface
A trap created to destroy the Architects
Franz should choose the function that best reflects the players’ investigations.
Meaningful victories may include:
Destroying a major cell
Saving a pylon complex
Turning an Architect
Exposing infiltration
Breaking a Chaos alliance
Recovering a control device
Protecting an unwitting pawn
Preventing Imperial civil conflict
Revealing the Sigil to key factions
Forcing the conspiracy to act early
Victories should weaken later operations.
They should not be erased by claiming every setback was secretly planned.
Failure may allow the Sigil to gain:
Pylon access
Political influence
Blackstone resources
A new Warp route
A corrupted commander
Stronger cult cells
A powerful captive
Support from a warband
Control of an astropathic network
Failure should change the final situation rather than end the campaign.
The party may still recover through alliances, sacrifice, or riskier alternatives.
The players expose or eliminate the Architects, destroy the communication network, and prevent activation of the Fractured Future.
Possible consequences include:
Surviving cells becoming isolated cults
Imperial factions claiming credit
Records of the conspiracy being suppressed
One missing Architect remaining unconfirmed
The pylons remaining unstable
Former pawns seeking revenge or redemption
Victory may end the organized Sigil without removing every Tzeentchian threat.
The Architects turn against one another before completing the plan.
Several partial rituals may activate at once, producing unstable regional effects.
The party may need to choose which faction to stop first.
Possible results include:
Localized null zones
Temporary Warp corridors
Trapped fleets
Conflicting prophecies becoming real
Independent cult remnants
One Architect escaping with part of the network
This outcome can create a chaotic but survivable aftermath.
The party or one allied faction gains temporary control of the pylons.
The network may be used to suppress the Warp, protect Cadia, or trap enemy fleets.
The cost may include:
Psychic casualties
Failed communication
Necron awakening
Isolation from Imperial travel
Dependence upon forbidden xenos technology
Conflict over who controls the system
This can prevent the Sigil’s intended victory while creating a new campaign crisis.
The conspiracy successfully creates an overlap of possible futures.
Cadia may exist in several unstable states, with locations shifting between:
Imperial control
Chaos occupation
Ruined emptiness
Pylon-enforced silence
Warp transformation
Echoes of battles that never occurred
The party may need to stabilize one outcome by completing further quests.
Success for the Sigil should create a new playable setting rather than an automatic campaign-ending defeat.
One Architect uses the larger operation to betray the others and seize its power.
The result may create:
A daemon prince
A reality-shaping sorcerer
A living pylon interface
A possessed command intelligence
A being existing across several timelines
The ascended Architect becomes a major boss or long-term villain.
Their power should depend upon vulnerable anchors the players can discover and destroy.
The Black Legion discovers the Sigil’s work and captures its devices or knowledge.
Abaddon may use the pylon network more directly against Cadia.
The surviving Architects may flee, cooperate with the party, or attempt to sabotage the Black Legion.
This outcome links the Hidden War more closely to the main siege.
The party may reject every existing plan.
They might:
Destroy some pylons and activate others
Give control to a Necron faction
Relocate part of the network
Trap both Imperial and Chaos fleets
Seal Cadia away temporarily
Use the Fractured Sigil against its creators
Create a new alliance around the Gate
This outcome should be permitted when it follows logically from their discoveries and sacrifices.
The conspiracy may continue after Cadia’s fate is decided.
Surviving threats may include:
Escaped Architects
Dormant cells
Corrupted records
Fractured timelines
Blackstone devices
Cults that misunderstood the original plan
Imperial officials hiding their involvement
Xenos factions claiming the pylons
A new organization using Sigil methods
The Hidden War should leave consequences without requiring every future adventure to involve Tzeentch.
The final confrontation should involve several simultaneous pressures.
Examples include:
A pylon must be defended
An ally is revealed as a pawn
Two Architects offer competing bargains
Chaos forces attack the ritual
Imperial authorities order the site destroyed
Civilians or soldiers are trapped nearby
The party must choose which future to stabilize
The finale should test what the characters have learned, whom they trust, and what they are willing to sacrifice.