CONTROL Resonant

Defeating Resonants · Resonant quest

Resonant questDefeating Resonants

The Underpass Resonant

Underpass · The Spire

Climb The Spire, enter the Astral Plane, find all three Astral Keys, and reach The Physicist.

BossThe Physicist
Start walkthroughFind an Astral Key
  • Underpass
  • The Spire
  • Defeating Resonants
Quest stepsStep 1 of 9

Steps are states, not a checklist. Mark where you are and the page keeps your place.

Quest line
Defeating Resonants
Zone
Underpass
Starting landmark
The Spire
Main route
Astral Plane
Boss
The Physicist
Major objective
Find 3 Astral Keys
Ability reward
Spike / Astral Rebuke

Looking for the other Underpass quest?

The Underpass Fault

Jesse · orange pipes · light projection puzzle

Open The Underpass Fault
Progression
Required progression
  • Jesse Görüntüleri: Alt Geçit FayıOpen

These are the prerequisite nodes our progression relation graph records for this quest.

Progression
Recursions and IterationsReach the UnderpassThe SpireAstral Plane3 Astral KeysLocked DoorThe PhysicistSpike / Astral Rebuke

Drawn from the progression relation graph and the quest registry, not from a fixed copy of the quest order.

Before you start

These are the prerequisite nodes our progression relation graph records for this quest.

Starting area

The Spire, in the Underpass

Recommended

Activate the nearby fast-travel door before you climb.

Traversal

Guides describe the climb with different names, such as Shift or Gravity Shift. The production relation data does not confirm a hard traversal gate here, so it is not shown as required.

Traversal used hereKayma

Quick answer

Reach The Spire in the Underpass, climb it and enter the Astral Plane. Follow the route to the central locked door, then find all three Astral Keys and return. The opened route leads to The Physicist. Beat the Resonant and choose between Spike and Astral Rebuke.

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Not started

Astral Keys

0 / 3 collected

The Underpass Resonant steps

Nine steps from The Spire to the ability choice. Mark each one as you finish it and the page keeps your place.

Not startedYour progress

  1. Reach The Spire

    Start in the Underpass and find the tall structure the quest marks.

    Current step
    Route
    1. Return to the Underpass
    2. Follow the objective marker to The Spire
    3. Approach the base from the marked side
    The Spire seen from the Underpass floor
    Landmark

    The Spire, the tall structure rising out of the Underpass

    Watch out

    If the quest is not in your log, reach the Underpass first, then approach The Spire.

  2. Climb The Spire

    See where The Spire leads by climbing it to the top.

    Route
    1. Start on the marked traversal surface
    2. Follow the climb route upward
    3. Use the traversal ability the route asks for
    4. Stop on the upper platform
    The climbable surface on The Spire
    Traversal used hereKayma

    Guides describe the climb with different names, such as Shift or Gravity Shift. The production relation data does not confirm a hard traversal gate here, so it is not shown as required.

    Landmark

    The climbable faces and ledges on The Spire

    Watch out

    If a climb will not work, check which side you approached from before assuming a traversal gate.

  3. Enter the Astral Plane

    Use the top of The Spire to cross into the Astral Plane.

    Route
    1. Reach the top of The Spire
    2. Look for the Astral Plane entrance
    3. Enter the Astral Plane
    The Astral Plane entrance at the top of The Spire

    Underpass → Entering → Astral Plane

    Landmark

    The top of The Spire

    Watch out

    The scene changes from the Underpass to the Astral Plane. If nothing changes, you are not at the entrance yet.

  4. Reach the Locked Door

    Follow the Astral Plane route until the main door blocks you.

    Route
    1. Follow the Astral Plane route
    2. Keep to the main path
    3. Stop at the central locked door
    The central locked door in the Astral Plane
    Landmark

    The central locked door in the Astral Plane

    Watch out

    The door is locked by design. This is where the Astral Keys come in.

  5. Find the Astral Keys

    Search the Astral Plane for all three Astral Keys.

    Route
    1. Open the Astral Key tracker below
    2. Follow one key route at a time
    3. Return to the locked door after each key
    Landmark

    Three separate key routes branching from the locked door

    Watch out

    The game calls all three Astral Keys. This page tracks them by route instead of inventing separate names.

  6. Open the Resonant Route

    Use all three keys to open the route to the Resonant.

    Route
    1. Confirm the tracker shows all keys collected
    2. Return to the locked door
    3. Open the route

    All Astral Keys collected

    Landmark

    The unlocked route behind the door

    Watch out

    If the door still will not open, check the tracker for the key you have not collected.

  7. Reach The Physicist

    Follow the opened route to the Resonant.

    Route
    1. Follow the opened route
    2. Keep moving toward the objective marker
    3. Reach the arena
    The arena entrance before The Physicist
    Landmark

    The arena at the end of the opened route

    Watch out

    This is the point of no return before the fight. Prepare before you continue.

  8. Defeat the Resonant

    Defeat the Astral Plane Resonant.

    Route
    1. Keep moving during the fight
    2. Watch the main telegraphed attacks
    3. Finish the encounter when the prompt appears
    Landmark

    The Resonant arena

    Watch out

    Deep fight strategy lives on the boss page. This step only keeps you moving.

Astral Keys

Three keys open the route to the Resonant. Track them here as you find them.

0 / 3 collected

Saved in this browser only. Key state never enters the URL.

  • Key Route 1

    From

    Central Locked Door

    Take
    1. Take the first branch away from the locked door
    2. Follow it to the end and look for the key
    3. Mark the return path as you go
    First key route branching from the locked door
    Landmarks
    • A distinct floating structure along the branch
    • The pedestal where the key sits
    At the end

    Key Route 1

    Return to the locked door

    Exact branch direction is pending verification. Use the branch that matches the landmarks.

  • Key Route 2

    From

    Central Locked Door

    Take
    1. Take the branch that crosses the open platforms
    2. Keep going past the first structure
    3. Look for the key at the far end
    Second key route across the open platforms
    Landmarks
    • The open platform crossing
    • The far structure at the end of the branch
    At the end

    Key Route 2

    Return to the locked door

    Exact branch direction is pending verification. Use the branch that matches the landmarks.

  • Key Route 3

    From

    Central Locked Door

    Take
    1. Take the remaining branch
    2. Follow it to the farthest point
    3. Look for the last key
    Third key route at the farthest point
    Landmarks
    • The longest branch from the door
    • The last pedestal
    At the end

    Key Route 3

    Return to the locked door

    Exact branch direction is pending verification. Use the branch that matches the landmarks.

Which Key Am I Missing?

Which door are you at?

You're likely missing: Key Route 1

Show route
Quest route complete

Next: The Physicist

Zone
Underpass / Astral Plane
Quest
The Underpass Resonant

Boss route unlocked.

Full boss guide
Recognition screenshot: The Physicist in the arena
Quick fight plan
  1. Keep moving during the fight
  2. Watch the main telegraphed attacks
  3. Use the safe damage windows
  4. Finish the encounter when the prompt appears

The Underpass Resonant

Completed
Boss defeated
The Physicist
Ability selected
Skip
Astral Keys
3 / 3
What changed?

The Resonant is defeated and its reward choice is resolved. This page does not invent world-state changes; anything that is not read from production stays out.

What next?

Continue your current story. If the next objective is unclear, let the tool pick up from your state.

What should I do next?

Choose your ability

Beat The Physicist and pick one combat ability. This page does not pick a winner.

Diken

Places an Astral Spike that keeps attacking nearby enemies.

View ability

Yeryırtan

Bursts from below to launch enemies into the air.

View ability

Not sure which one fits your build? Compare them first.

Compare Spike vs Astral Rebuke

Rewards

The main reward is a combat ability choice. Numeric rewards and artifacts are database fields, so this page does not hardcode them.

Combat ability choice

Spike / Astral Rebuke

Compare Spike vs Astral Rebuke

Artifact

Data gated

Other rewards

Read from production when available

Untapped is a state, not a second artifact. The canonical artifact identity stays pending until the relation is closed.

Stuck on The Underpass Resonant?

What's happening?

Why can't I continue?

It is usually one of these: a missing prerequisite, a wrong tracked quest, a traversal requirement, an interaction requirement, a missing key, or a known issue. Check which one applies before calling it a bug.

  • The quest isn't in my log

    Check that you have reached the Underpass and that the right quest is tracked, then approach and inspect The Spire.

  • I can't climb The Spire

    Check which side you approached from and whether you have the traversal progression the route expects before assuming a bug.

  • I reached the Astral Plane but the door is locked

    This is expected. The locked door is the main obstacle of this quest. Find the Astral Keys.

  • I'm missing one Astral Key

    Open the Astral Key tracker and check which route you have not marked. Use the Which Key Am I Missing? helper.

  • I have all keys but can't progress

    Check the key state, the door interaction, any remaining branch and your active objective before concluding the quest is broken.

  • I reached the boss but can't beat it

    Open the full boss guide for attacks, phases and counters. This page only owns reaching the fight.

Known issue

Only problems listed in the updates registry are labelled as known issues.

Open known issues
None of these? Open the Quest Troubleshooter
After The Underpass Resonant

Continue progression

The Resonant route is closed. Continue the Resonant quest line or return to the main story.

Comes after
  • Jesse Görüntüleri: Alt Geçit FayıOpen
Leads to
  • Bilinmeyen RezonantNo published page yet
You're on The Underpass Resonant

Where are you stuck?

The assistant knows the Astral Key state, the locked door and where this page hands off to the boss guide.

Ask about this quest

Or type your own question

Where this page sits

This page owns The Underpass Resonant route: The Spire, the Astral Plane, the three Astral Keys and the path to the Resonant. Boss fight strategy lives on the boss page; the ability decision lives in the comparison guide.

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