
Xaku — The Lost Cycle
Endgame build. Accuse converts a pack, Gaze strips, Deny beams Void and wipes Sentient resistances. You actually use all three Lost modes. Whisper is the Helminth hole.
Codex Checked · Compared against current game data for this update. · Update 43.5 · 5 Sept 2026 · PC · Current
Mixed tiles, Sentients, people who like the kit more than the halo
Wrong drop or mechanic?
Don’t build this yet
First Bones first
This loadout sits at Endgame. It wants Forma, Helminth, or shards you may not have. Play the Starter until those systems are open — then this page is the upgrade, not the homework.
Open First BonesWhy this build?
Endgame for Mixed tiles, Sentients, people who like the kit more than the halo
Health: Not yet — Helminth, Steel Path, or Archon Hunts still closed. Play the Starter.
- The Lost is a kit, not a skip button. This config exists for people who like all three.
- Xata's Whisper is the Helminth slot on serious Xaku. Grasp guns do not gain Whisper.
- Deny without Grasp guns is a sad beam. 2 first always.
Don’t use this for: players without Helminth
Specialised investment for hard content
You don’t need the shards to run the loop. They are a later ceiling, not a gate.
Bring: Cycle discipline — The Lost is one button, three modes. Accuse for friends, Gaze for strip, Deny for a Void beam that also scales with how many Grasp guns you stole.
Alternative if…
- You don’t have Helminth yet → First Bones
- Star Chart only → First Bones
- New account or low investment → First Bones
- This is too much Forma / cost → Lohk Battery — Optimised
My test
Did this still work for you?
Your note, in this browser. Separate from Codex verification — the stamp on the card is editorial, this is yours.
Readiness
Inventory unknown
Not checked — add your collection. You have not failed a test.
- Required mods 0/9 · required — 0/9 named
- Forma 0/4 · required — 4 on the card. Codex does not track installed Forma.
- Helminth 0/1 · required — Subsume Nourish (Grendel) or Roar (Rhino)
- Arcanes · recommended — 0/2 recommended
- Shards · optional — Optional unless the card says a breakpoint
Investment: 4 Forma · Reactor · Helminth (Nourish (Grendel) or Roar (Rhino)) · 2 shards · 4 specialised mods. Typical farm ~4–6 hours. Trade if a route is vaulted.
Codex Checked · Compared against current game data for this update. · Update 43.5 · 5 Sept 2026 · PC · Current
Medium confidence. A solid recommendation with more situational dependencies. Confidence is not verification. Verification is separate: Codex Checked against Update 43.5.
Plan
Today → next → later
Inventory unknown — mark “I own this” on a few mods. Until then this is a plan, not a score of zero.
- TodayPlay First BonesThe Starter is the loadout you can actually take into a mission tonight.
- NextGet Growing PowerThe Silver Grove quest
- After that4 FormaOne slot at a time. Rank 30 after each polarize.
- LaterAmber · Casting SpeedHelminth and shards are the last rungs. They are not the Starter.
- FinalThe Lost CycleEndgame · Endgame · 4 Forma
Helminth & shards
What to put on the body
Nourish (Grendel) or Roar (Rhino) over Xata's Whisper (1)
Whisper is a Void damage buff for your gun. Grasp does not need it. Nourish is Viral + energy. Roar multiplies stolen-gun hits. Keep 2, 3, and 4.
Helminth is locked. Tick it on Progress before you subsume.
- 2 Amber · Casting Speed — Cycling Lost is the skill.Archon locked
- 2 Crimson · Strength — All three Lost modes.Archon locked
Tonight
What is actually up
30 minutes, one hour, or two — matched to this loadout, not a dump of the Origin System.
30 minutes
Farm Growing Power
One named gap. The Silver Grove quest
60 minutes
Growing Power, then Forma
Finish the missing named card, then spend a Forma if a polarity is still fighting you.
120 minutes
Subsume Nourish (Grendel) or Roar (Rhino)
If you are logging off after this, stop at the named component. Do not start a second Forma session tired.
- Farm Growing Power
The Silver Grove quest
Who this is for
Play this build from zero
You Helminthed Whisper and you actually want all three Lost modes.
- Time to a playable copy
- After Nourish or Roar over 1, plus casting speed so the cycle is not agony.
- First mission to practice in
- A mixed Exterminate with a Sentient or two if you can find them.
2 button drills · 14 parts · tick the lists as you go
Before you start
0 of 3 done
Put it on the Warframe
0 of 4 done
Keep this up
Lost loop
Pocket card. Stick this on a second screen; the long version is the mission below.
- 1Grasp (2) first — Deny cares how many guns you stole.
- 2Accuse (3) a clump so they fight each other.
- 3Gaze (3) the Eximus.
- 4Deny (3) the leftover or the Sentient. Untime (4) to pause everything. Nourish/Roar (1) on the timer.
First mission — press these buttons
- 1
Steal guns, then Accuse a clump
3They fight each other.
- 2
Gaze the Eximus, Deny the leftover
3Deny hits harder with a fat halo. Untime pauses the ones you want to keep.
Common mistakes
Deny with zero guns
The beam is multiplied by gun count. Steal first.
When this feels easy
- 1Casting speed shards are not optional hereThree modes on one key. Tempo is the build.
Parts checklist
0 of 14 owned. Tap How on anything you still need.
Dependencies
19 dependencies
Frame → mods → unlocks. Tick Collection and Progress. This is a decision graph, not a wiki tree.
- 1●xakuframe
- 2○Growing Powermod
- 3○Cunning Driftmod
- 4○Blind Ragemod
- 5○Umbral Intensifymod
- 6○Overextendedmod
- 7○Stretchmod
- 8○Primed Continuitymod
- 9○Primed Flowmod
- 10○Rolling Guardmod
- 11○Molt Augmentedarcane
- 12○Arcane Energizearcane
- 13○Amber · Casting Speedshard
- 14○Crimson · Strengthshard
- 15○Nourishhelminth
- 16○Roar (Rhino)helminth
- 17○Helminth · Nourish (Grendel) or Roar (Rhino)unlock
- 18○Steel Pathunlock
- 19○Archon Hunts (shards optional)unlock
Depends on
What this loadout needs
Required is a gate. Recommended is a ceiling. Optional is a later farm — don’t stall the card for it.
Required
Growing Powermissing · The Silver Grove quest
Cunning Driftmissing · Lua Halls of Ascension
Blind Ragemissing · Run Orokin Vaults
Umbral Intensifymissing · Finish The Sacrifice
Overextendedmissing · Orokin Vaults
Stretchmissing · Enemy drops
Primed Continuitymissing · Wait for Baro Ki'Teer
Primed Flowmissing · Baro Ki'Teer
- Rolling Guard
missing · Arbitrations
- Nourish
missing · Helminth
Whisper is a Void damage buff for your gun. Grasp does not need it. Nourish is Viral + energy. Roar multiplies stolen-gun hits. Keep 2, 3, and 4.
Roar (Rhino)missing · Own Rhino
Whisper is a Void damage buff for your gun. Grasp does not need it. Nourish is Viral + energy. Roar multiplies stolen-gun hits. Keep 2, 3, and 4.
Recommended
Optional
Helminth
Subsume Nourish (Grendel) or Roar (Rhino) over Xata's Whisper (1)
Whisper is a Void damage buff for your gun. Grasp does not need it. Nourish is Viral + energy. Roar multiplies stolen-gun hits. Keep 2, 3, and 4.
Strength
~220%
Duration
160%
Range
200%
Deny damage multiplies with Grasp gun count. Steal guns before you beam.
From the mods
Live power
Additive from max-rank Codex mods. Efficiency clamped 15–175%. Umbral set is +11% Strength per extra piece.
- Strength
- 183%
- Duration
- 155%
- Range
- 250%
- Efficiency
- 45%
- Energy
- +275%
- Capacity
- 52 / 67
1 Umbral piece
Weapon HUD
Arsenal numbers
Base × damage mods × crit expectation × fire rate × multishot. No faction, no quantization. Galvanized kill stacks are a slider, not assumed.
- Damage
- 35
- Crit
- 12% × 2.00
- Status
- 26%
- Fire rate
- 9.58
- Multishot
- 1.00
- Avg hit
- 39
- Arsenal DPS
- 376
Toggle common mods
Xaku mods
- Aura
Growing PowerSilver Grove - Exilus
Cunning DriftLua - 1
Blind RageOrokin Vaults - 2
Umbral IntensifyThe Sacrifice - 3
OverextendedOrokin Vaults - 4
StretchDrops - 5
Primed ContinuityBaro - 6
Primed FlowBaro - 7Rolling GuardArbitrations
| Slot | Mod | Source | How |
|---|---|---|---|
| Aura | Growing Power | Silver Grove | |
| Exilus | Cunning Drift | Lua | |
| 1 | Blind Rage | Orokin Vaults | |
| 2 | Umbral Intensify | The Sacrifice | |
| 3 | Overextended | Orokin Vaults | |
| 4 | Stretch | Drops | |
| 5 | Primed Continuity | Baro | |
| 6 | Primed Flow | Baro | |
| 7 | Rolling Guard | Arbitrations |
Cycle discipline
The Lost is one button, three modes. Accuse for friends, Gaze for strip, Deny for a Void beam that also scales with how many Grasp guns you stole.
Arcanes
Molt Augmented
Strength for Accuse chance, Gaze strip, Deny beam.
Zariman
Arcane Energize
You will cycle 3 a lot.
Eidolon
Archon shards
- 1
Amber · Casting SpeedCycling Lost is the skill.2 · EDA - 2
Crimson · StrengthAll three Lost modes.2 · Netracells
| # | Shard | Qty | Source | How |
|---|---|---|---|---|
| 1 | Amber · Casting SpeedCycling Lost is the skill. | 2 | EDA | |
| 2 | Crimson · StrengthAll three Lost modes. | 2 | Netracells |