Theorylytics

Warframe Augment

The Relentless Lost

For The Lost·Used by Xaku →

9

The Relentless Lost

The Lost Augment: The Lost gains 35% Ability Strength and 15% Ability Efficiency when cast. The effect stacks up to 3x. Casting the same…

Xaku

Augments The Lost

The Lost Augment: The Lost gains 35% Ability Strength and 15% Ability Efficiency when cast. The effect stacks up to 3x. Casting the same ability back-to-back resets the effect.

Ranks 0–3 · base drain 6

AcquisitionCommonly listed from Cephalon Suda, Genius; also check Syndicate offerings / trade.

Verified 2026-07-22

Augment dossier · The Relentless Lost

Ability 3 · The Lost

Rank Table

RankStats
Rank 0
  • The Lost Augment: The Lost gains 5% Ability Strength and 6% Ability Efficiency when cast. The effect stacks up to 3x. Casting the same ability back-to-back resets the effect.
Rank 1
  • The Lost Augment: The Lost gains 15% Ability Strength and 9% Ability Efficiency when cast. The effect stacks up to 3x. Casting the same ability back-to-back resets the effect.
Rank 2
  • The Lost Augment: The Lost gains 25% Ability Strength and 12% Ability Efficiency when cast. The effect stacks up to 3x. Casting the same ability back-to-back resets the effect.
Rank 3
  • The Lost Augment: The Lost gains 35% Ability Strength and 15% Ability Efficiency when cast. The effect stacks up to 3x. Casting the same ability back-to-back resets the effect.

Cast Changes

  • Changes how The Lost plays: The Lost Augment: The Lost gains 35% Ability Strength and 15% Ability Efficiency when cast.
  • Higher ranks usually improve the key magnitude or duration of the augment.

Worth the Slot?

  • Equip The Relentless Lost when that change is part of your standard Xaku loop.
  • Skip it for generalist builds if capacity is tighter on survivability or parkour mods.

Mission Usefulness

Mission / ContextRatingWhy
Steel Path Survival / Defense / DisruptionStrongDense missions are where most Xaku augments prove whether they belong in the build.
Mobile Defense / ExcavationSituationalWorth it if the augment helps hold or clear the objective faster.
Casual Star-Chart FarmsSituationalOften skippable when base abilities already overkill the content.

Tips & Tricks

  • Read the max-rank text — The Relentless Lost often only feels complete at rank 3.
  • Try one mission with and without it on Xaku before locking the slot.
  • If you Helminth over The Lost, this augment usually becomes irrelevant on that loadout.

Notes

  • Compatible with Xaku (Xaku).
  • Polarity: zenurik; rarity: Rare.

Other Xaku augments