Hydroid — Corrosive Corsair
Steel Path build. High Strength Plunder. Viral Tempest primes. Guns inherit a huge Corrosive bonus. This is 2026 Hydroid. This is the peak you can run the day Steel Path unlocks — galvanized / arcanes, no Helminth.
Codex Checked · Compared against current game data for this update. · Update 43.5 · 5 Sept 2026 · PC · Current
Steel Path Star Chart, Circuit, first Archon. Helminth is the next card.
Wrong drop or mechanic?
Why this build?
Steel Path for Steel Path Star Chart, Circuit, first Archon. Helminth is the next card.
Health: Not yet — Helminth, Steel Path, or Archon Hunts still closed. Play the Starter.
- Plunder is a weapon buff, an ability buff, and a personal armor pile. That is the identity.
- Viral Tempest is the cheap primer so you do not need a second element on the gun.
- Tidal Surge is the usual Helminth slot on campy tiles. Keep it on mobile missions.
Don’t use this for: Star Chart only · loadouts that need Helminth
Stronger mods, Arcanes, real synergy
You don’t need the shards to run the loop. They are a later ceiling, not a gate.
Bring: Primary / secondary — Build the gun for crit and status, not for Corrosive — Plunder supplies that. Viral Heat or pure Slash both work once armor is gone.
Alternative if…
- Star Chart only → First Tide
- This is too much Forma / cost → First Tide — Star Chart
- You wanted the ability loop, not guns → First Tide
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 · 1 shard · 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.
Your next step
Next: Corrosive Corsair — Optimised
Unlock Helminth, Steel Path, or Archon Hunts before this upgrade is honest.
Corrosive Corsair — 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 that3–4 FormaOne slot at a time. Rank 30 after each polarize.
- LaterEmerald · Ability damage on Corrosive statusHelminth and shards are the last rungs. They are not the Starter.
- FinalCorrosive Corsair — Steel PathSteel Path · Advanced · 3–4 Forma
Upgrade from here
Corrosive Corsair — Optimised
Locked behind Helminth, Steel Path, or Archon Hunts. Tick those on Progress first.
Open Corrosive Corsair — OptimisedFarm the gap
- Hydroid augments — Viral Tempest · Tidal Impunity · Rousing Plunder · Pilfering Swarm
Helminth & shards
What to put on the body
- 1 Emerald · Ability damage on Corrosive status — Barrage and Breach Surge hit Corrosive-primed packs harder.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
Steel Path. You own Viral Tempest and a real gun.
- Time to a playable copy
- After Blind Rage and a Tidal Surge subsume (optional).
- First mission to practice in
- SP Grineer Exterminate. You should see armor vanish and guns spike.
3 button drills · 12 parts · tick the lists as you go
Before you start
0 of 3 done
Put it on the Warframe
0 of 5 done
Keep this up
Plunder loop
Pocket card. Stick this on a second screen; the long version is the mission below.
- 1Viral Tempest Barrage (1) the tile. Viral + Corrosive start cooking.
- 2Plunder (3). Watch the armor and Corrosive buffs climb. Recast whenever a new pack walks in.
- 3Nourish or Breach Surge (2). Then shoot. Your weapon is wearing Plunder's Corrosive.
- 4Tentacle Swarm (4) if you kept it — grouping for the next Plunder. Or skip 4 and keep moving.
First mission — press these buttons
- 1
Barrage the tile
1Viral + Corrosive start.
- 2
Plunder immediately
3Steal while stacks are live. Recast every new pack.
- 3
Buff and shoot
2Nourish/Surge then empty the magazine.
Common mistakes
Plunder before Barrage
Empty stacks mean a tiny Corrosive bonus. Rain first.
When this feels easy
- 1Emerald shardsAbility damage vs Corrosive status. Barrage becomes a nuke.
- 2Molt AugmentedStrength as you kill. Recast Plunder after it stacks.
Parts checklist
0 of 12 owned. Tap How on anything you still need.
Dependencies
15 dependencies
Frame → mods → unlocks. Tick Collection and Progress. This is a decision graph, not a wiki tree.
- 1●hydroidframe
- 2○Growing Powermod
- 3○Power Driftmod
- 4○Viral Tempestaugment
- 5○Blind Ragemod
- 6○Transient Fortitudemod
- 7○Intensifymod
- 8○Primed Continuitymod
- 9○Primed Flowmod
- 10○Equilibriummod
- 11○Molt Augmentedarcane
- 12○Arcane Blessingarcane
- 13○Emerald · Ability damage on Corrosive statusshard
- 14○Steel Pathunlock
- 15○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
Power Driftmissing · Unlock Lua
- Viral Tempest
missing · Cephalon Suda / New Loka · 25,000 standing
Barrage inflicts Viral. Armor shred plus health shred in one rain.
Blind Ragemissing · Run Orokin Vaults
Transient Fortitudemissing · Same vaults as Blind Rage
Intensifymissing · Fight Lieutenant Lech Kril
Primed Continuitymissing · Wait for Baro Ki'Teer
Primed Flowmissing · Baro Ki'Teer
- Equilibrium
missing · The New Strange / drops
Recommended
Molt Augmentedmissing · Unlock the Zariman
Kills add Strength. Plunder and Barrage both scale. Rank 0 is legal. Rank 3 is the Steel Path version.
- Arcane Blessing
missing · Orphix / trade
Health from orbs. You dumped Vitality for Strength. Rank 0 is legal. Rank 3 is the Steel Path version.
Optional
- Emerald · Ability damage on Corrosive status
missing · Netracells / EDA
Barrage and Breach Surge hit Corrosive-primed packs harder.
Strength
~250–320% (Blind Rage, Transient Fortitude, Umbral Intensify, Molt Augmented)
Duration
155–200% so Plunder stays up
Range
145–175%
Plunder caps on enemy count + Corrosive stacks. Barrage first, then steal.
From the mods
Live power
Additive from max-rank Codex mods. Efficiency clamped 15–175%. Umbral set is +11% Strength per extra piece.
- Strength
- 299%
- Duration
- 128%
- Range
- 100%
- Efficiency
- 45%
- Energy
- +275%
- Capacity
- 53 / 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
Hydroid mods
- AuraGrowing PowerSilver Grove specters
- ExilusPower DriftOrokin Vaults / Lua
- 1Viral TempestBarrage inflicts Viral. Armor shred plus health shred in one rain.Cephalon Suda / New Loka · 25k
- 2Blind RageOrokin Vaults
- 3Transient FortitudeOrokin Vaults
- 4IntensifyMercury / Venus
- 5Primed ContinuityBaro Ki'Teer
- 6Primed FlowBaro Ki'Teer / relics
- 7EquilibriumThe New Strange / drops
| Slot | Mod | Source | How |
|---|---|---|---|
| Aura | Growing Power | Silver Grove specters | |
| Exilus | Power Drift | Orokin Vaults / Lua | |
| 1 | Viral Tempest Barrage inflicts Viral. Armor shred plus health shred in one rain. | Cephalon Suda / New Loka · 25k | |
| 2 | Blind Rage | Orokin Vaults | |
| 3 | Transient Fortitude | Orokin Vaults | |
| 4 | Intensify | Mercury / Venus | |
| 5 | Primed Continuity | Baro Ki'Teer | |
| 6 | Primed Flow | Baro Ki'Teer / relics | |
| 7 | Equilibrium | The New Strange / drops |
Primary / secondary
Build the gun for crit and status, not for Corrosive — Plunder supplies that. Viral Heat or pure Slash both work once armor is gone.
Arcanes
Molt Augmented
Kills add Strength. Plunder and Barrage both scale. Rank 0 is legal. Rank 3 is the Steel Path version.
Zariman bounties
Arcane Blessing
Health from orbs. You dumped Vitality for Strength. Rank 0 is legal. Rank 3 is the Steel Path version.
Duviri / trade
Archon shards
- 1Emerald · Ability damage on Corrosive statusBarrage and Breach Surge hit Corrosive-primed packs harder.1 · Netracells / EDA
| # | Shard | Qty | Source | How |
|---|---|---|---|---|
| 1 | Emerald · Ability damage on Corrosive status Barrage and Breach Surge hit Corrosive-primed packs harder. | 1 | Netracells / EDA |