Theorylytics

Hydroid Prime

Corsair Plunder

Plunder Armor Tank

Frame
Hydroid Prime
Forma
2
Playstyle
Helminth
Keep 3 · Plunder

Plunder Hydroid - stack Deepened marks, cash them for huge armor and Corrosive damage, and hold Steel Path points as a corsair tank. Hydroid Prime's extra polarities cut Forma versus base Hydroid for the same polarity story.

Alternative builds

Build dossier · Corsair Plunder

2 Forma

Loadout

Aura + Exilus on top, then eight general slots in two rows of four.

-7

Growing Power

On Status Effect with Weapon: Squad increases personal Ability Strength by 25% for 6s.

9

Power Drift

+15% Ability Strength · +30% Chance to Resist Knockdown

16

Blind Rage

+99% Ability Strength · -55% Ability Efficiency

16

Transient Fortitude

+55% Ability Strength · -27.5% Ability Duration

14

Primed Continuity

+55% Ability Duration

14

Stretch

+82.5% Ability Range

12

Adaptation

When Damaged: · +10% Resistance to that Damage Type for 20s. Stacks up to 90%.

9

Viral Tempest

Tempest Barrage Augment: Each projectile has a 100% chance of inflicting a Viral Status Effect.

12

Rolling Guard

On Dodge: · Become invulnerable for 3s and remove all Status Effects. 7s cooldown.

16

Umbral Intensify

+44% Ability Strength · +11% Tau Resistance

Arcanes

Recommended pair first, then flexible swaps.

RecommendedMolt AugmentedWarframe · RareStrengthRecommendedArcane GuardianWarframe · UncommonArmor
Arcane BlessingWarframe · RareAlt health

Arsenal

Playstyle

Deepen with Barrage or guns, Plunder for huge armor and Corrosive damage, stay on the point. Rousing Plunder optional squad share.

Passive abilities

Enemies damaged by Hydroid become Deepened — further hits strip armor. Plunder spends those Deepened marks for armor and Corrosive damage for you and allies.

Active abilities

  • 1 Tempest Barrage — Rain explosive water. Viral Tempest adds Viral procs to the barrage.
  • 2 Tidal Surge — Dash as a wave — invulnerable travel and status cleanse. Tidal Impunity shares the cleanse.
  • 3 Plunder — Cash Deepened marks for armor and Corrosive damage. Rousing Plunder shares loot/buff fantasy with the squad.
  • 4 Tentacle Swarm — Kraken tentacles hold packs. Pilfering Swarm adds loot chance on tentacle kills.
  • Keep Plunder. Optional Rousing Plunder. Viral Tempest recommended.

Mod breakdown

Strength

Primary investment — Plunder armor and Corrosive buff scale hard.

Duration / Range

Buff uptime and Deepen tools.

Aura / Exilus

Archon shards

  • Strength — Plunder stacks
  • Armor flex
  • Casting Speed

Helminth

Keep Plunder. Roar / Nourish over Tentacle Swarm if you skip loot camping.

Mission Usefulness

  • Steel Path Survival / Defense / Disruption

    Excellent

    Plunder armor stacks and Corrosive buff turn Hydroid into an SP tank caster.

  • Mobile Defense / Excavation

    Excellent

    Deepen the point wave, Plunder, stay.

  • Exterminate / Capture Speed Runs

    Strong

    Armor comfort with Barrage clears.

  • Spy / Rescue / Nightmare

    Weak

    Not stealth.

  • Open World / Bounties

    Strong

    Tanky camps.

  • Long-Range Gunplay / Eidolon-Style Content

    Situational

    Corrosive gun buff helps; still not an Amp frame.