Kullervo — Ukko's Weather
Steel Path build. Storm of Ukko dagger rain. Wrath of Ukko augment follows you. A caster Kullervo for people who want 4 to do something.
Codex Checked · Compared against current game data for this update. · Update 43.5 · 5 Sept 2026 · PC · Current
Defense tiles, people who like raining knives, a change of pace from pure melee
Wrong drop or mechanic?
Why this build?
Steel Path for Defense tiles, people who like raining knives, a change of pace from pure melee
Health: Not yet — Helminth, Steel Path, or Archon Hunts still closed. Play the Starter.
- Most Kullervo players never press 4. This config exists so you can.
- Wrath of Ukko is the augment that makes 4 a mobile ability instead of a turret.
- It will lose a DPS contest to Red Crit King. It will win a 'I want knives from the ceiling' contest.
Don’t use this for: Capture / short missions · Exterminate speedruns
Stronger mods, Arcanes, real synergy
You don’t need the shards to run the loop. They are a later ceiling, not a gate.
Bring: Melee still equipped — Storm is the flavor. Wrathful still buffs the blade for leftovers. Do not holster the melee.
Alternative if…
- Star Chart only → First Betrayal
- This is too much Forma / cost → First Betrayal — Star Chart
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 · optional — Not required
- Arcanes · recommended — 0/2 recommended
- Shards · optional — Optional unless the card says a breakpoint
Investment: 4 Forma · Reactor · 2 shards · 3 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.
Your next step
Next: Red Crit King — Optimised
Unlock Helminth, Steel Path, or Archon Hunts before this upgrade is honest.
Red Crit King — OptimisedPlan
Today → next → later
Inventory unknown — mark “I own this” on a few mods. Until then this is a plan, not a score of zero.
- NextGet Growing PowerThe Silver Grove quest
- After that4 FormaOne slot at a time. Rank 30 after each polarize.
- LaterAzure · DurationHelminth and shards are the last rungs. They are not the Starter.
- FinalUkko's WeatherSteel Path · Advanced · 4 Forma
Upgrade from here
Red Crit King — Optimised
Locked behind Helminth, Steel Path, or Archon Hunts. Tick those on Progress first.
Open Red Crit King — OptimisedFarm the gap
- Kullervo augments — Volatile Recompense · Wrath of Ukko
Helminth & shards
What to put on the body
- 2 Azure · Duration — Storm uptime.Archon locked
- 2 Crimson · Strength — Dagger damage and Wrathful leftover.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
One Archon Hunt
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 bought Wrath of Ukko and want raining knives.
- Time to a playable copy
- After the augment and Duration mods.
- First mission to practice in
- A Defense. Walk the storm around the pod.
2 button drills · 13 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
Storm loop
Pocket card. Stick this on a second screen; the long version is the mission below.
- 1Recompense (2). Overguard.
- 2Storm of Ukko (4). Walk. Wrath of Ukko drags the rain with you.
- 3Wrathful (1) anything the rain is slow to kill.
- 4Curse (3) if a clump needs to share.
First mission — press these buttons
- 1
Drop the rain and walk
44. The augment drags it with you.
You will know it worked when: Knives from the ceiling, following your steps.
- 2
Still recast 2
A storm does not grant Overguard.
Common mistakes
Comparing DPS to Red Crit King
This is weather. That is murder. Different configs.
When this feels easy
- 1Do not drop Wrathful for more DurationLeftovers still need the blade.
Parts checklist
0 of 13 owned. Tap How on anything you still need.
Dependencies
16 dependencies
Frame → mods → unlocks. Tick Collection and Progress. This is a decision graph, not a wiki tree.
- 1●kullervoframe
- 2○Growing Powermod
- 3○Cunning Driftmod
- 4○Wrath of Ukkoaugment
- 5○Blind Ragemod
- 6○Primed Continuitymod
- 7○Stretchmod
- 8○Overextendedmod
- 9○Primed Flowmod
- 10○Equilibriummod
- 11○Molt Efficiencyarcane
- 12○Arcane Energizearcane
- 13○Azure · Durationshard
- 14○Crimson · Strengthshard
- 15○Steel Pathunlock
- 16○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
- Wrath of Ukko
missing · Warframe augment syndicates · 25,000 standing
The storm follows you instead of sitting in one puddle.
Blind Ragemissing · Run Orokin Vaults
Primed Continuitymissing · Wait for Baro Ki'Teer
Stretchmissing · Enemy drops
Overextendedmissing · Orokin Vaults
Primed Flowmissing · Baro Ki'Teer
- Equilibrium
missing · The New Strange / drops
Recommended
Optional
Strength
~220%
Duration
200%+ rain uptime
Range
175% storm radius
Wrath of Ukko makes the storm follow Kullervo. Duration is the ability.
From the mods
Live power
Additive from max-rank Codex mods. Efficiency clamped 15–175%. Umbral set is +11% Strength per extra piece.
- Strength
- 139%
- Duration
- 155%
- Range
- 250%
- Efficiency
- 45%
- Energy
- +275%
- Capacity
- 50 / 67
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
Kullervo mods
- AuraGrowing PowerSilver Grove
- ExilusCunning DriftLua Halls
- 1Wrath of UkkoThe storm follows you instead of sitting in one puddle.Warframe augment syndicates · 25k
- 2Blind RageOrokin Vaults
- 3Primed ContinuityBaro Ki'Teer
- 4StretchEnemy drops
- 5OverextendedOrokin Vaults
- 6Primed FlowBaro / relics
- 7EquilibriumThe New Strange
| Slot | Mod | Source | How |
|---|---|---|---|
| Aura | Growing Power | Silver Grove | |
| Exilus | Cunning Drift | Lua Halls | |
| 1 | Wrath of Ukko The storm follows you instead of sitting in one puddle. | Warframe augment syndicates · 25k | |
| 2 | Blind Rage | Orokin Vaults | |
| 3 | Primed Continuity | Baro Ki'Teer | |
| 4 | Stretch | Enemy drops | |
| 5 | Overextended | Orokin Vaults | |
| 6 | Primed Flow | Baro / relics | |
| 7 | Equilibrium | The New Strange |
Melee still equipped
Storm is the flavor. Wrathful still buffs the blade for leftovers. Do not holster the melee.
Arcanes
Molt Efficiency
Duration. The rain stays.
Zariman
Arcane Energize
100-energy storms.
Eidolon hunts
Archon shards
- 1
Azure · DurationStorm uptime.2 · Netracells - 2
Crimson · StrengthDagger damage and Wrathful leftover.2 · Netracells
| # | Shard | Qty | Source | How |
|---|---|---|---|---|
| 1 | Azure · Duration Storm uptime. | 2 | Netracells | |
| 2 | Crimson · Strength Dagger damage and Wrathful leftover. | 2 | Netracells |