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Impenetrable Offense
Warframe · Mod

Impenetrable Offense

Conclave melee mod reference

Released Jul 31, 2015

Impenetrable Offense is a Conclave melee mod that increases Damage Block while reducing Melee Damage. Consider the listed tradeoff when fitting it for Conclave.

TypeMeleePolaritymaduraiMax rank3Base drain10VariantConclaveRarityRare
Impenetrable Offense GUIDE

Understand Impenetrable Offense

Useful when…

  • Trade some Melee Damage for the listed Damage Block bonus in Conclave.

Conclave effect

At rank 3, Impenetrable Offense grants +30% Damage Block and reduces Melee Damage by 10%. The listed rank 0 effects are +7.5% Damage Block and −2.5% Melee Damage; rank 2 lists +22.5% and −7.5%.

Fit and rank

This Rare Conclave mod is compatible with Melee, uses a standard slot, and has Madurai polarity. It can be fused to rank 3. Rank 1 effects are not listed.

wiki.warframe.com ↗

Drain and fusion

The mod has base drain 10. Its listed fusion steps cost 30 Endo and 1,449 Credits for ranks 0–1, 60 Endo and 2,898 Credits for ranks 1–2, and 120 Endo and 5,796 Credits for ranks 2–3.

wiki.warframe.com ↗

Limitations and tradeoffs

  • In Conclave, increased Damage Block is paired with reduced Melee Damage.
  • Higher fusion ranks require additional Endo and Credits.

Common mistakes to avoid

  • Ignoring the Melee Damage penalty when fitting the mod.
  • Assuming a rank 1 effect not listed here.

Effects and reference details

Rank effects and investment

RankListed effectsUnpolarized drainTotal Endo from rank 0Total Credits from rank 0
0+7.5% Damage Block
-2.5% Melee Damage
1000
1+15% Damage Block
-5% Melee Damage
11301,449
2+22.5% Damage Block
-7.5% Melee Damage
12904,347
3+30% Damage Block
-10% Melee Damage
1321010,143

These are listed mod effects and fusion costs, not final build damage. Matching and mismatched polarities change capacity. Totals assume starting at rank 0.

References and version

Game data version: Pinned public export

Impenetrable Offense — WARFRAME Wiki ↗wiki.warframe.com ↗
Technical source data for verification

These machine-readable game records support the calculations and factual checks. The wiki references above are intended for reading.

Raw game data (JSON) ↗wiki.warframe.com ↗Warframe Public Export ↗

Original data record ↗

Optional: calculate an upgrade or configurationOpen the calculator when you want a cost estimate or a compatibility check.
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Fusion cost and capacity

0Endo
0Credits
10Target slot drain
RankObserved effectDrainEndo from 0Credits from 0
0+7.5% Damage Block · -2.5% Melee Damage1000
1+15% Damage Block · -5% Melee Damage11301,449
2+22.5% Damage Block · -7.5% Melee Damage12904,347
3+30% Damage Block · -10% Melee Damage1321010,143

Slot polarity changes drain; fusion prices depend on mod rarity and family.

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