Warframe Augment

Fused Reservoir

Fused Reservoir

Reservoirs Augment: Adds a fourth reservoir that gives the effects of all three. Costs 200% more Energy.

Wisp

Reservoirs Augment: Adds a fourth reservoir that gives the effects of all three. Costs 200% more Energy.

Ranks 0–3 · base drain 6

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

Verified 2026-07-22

Augment dossier · Fused Reservoir

Ability 1 · Reservoirs

Rank Table

Rank	Stats
Rank 0	Reservoirs Augment: Adds a fourth reservoir that gives the effects of all three. Costs 300% more Energy.
Rank 1	Reservoirs Augment: Adds a fourth reservoir that gives the effects of all three. Costs 270% more Energy.
Rank 2	Reservoirs Augment: Adds a fourth reservoir that gives the effects of all three. Costs 250% more Energy.
Rank 3	Reservoirs Augment: Adds a fourth reservoir that gives the effects of all three. Costs 200% more Energy.

Changes how Reservoirs plays: Reservoirs Augment: Adds a fourth reservoir that gives the effects of all three.
Higher ranks usually improve the key magnitude or duration of the augment.

Equip Fused Reservoir when that change is part of your standard Wisp loop.
Skip it for generalist builds if capacity is tighter on survivability or parkour mods.

Mission / Context	Rating	Why
Steel Path Survival / Defense / Disruption	Strong	Dense missions are where most Wisp augments prove whether they belong in the build.
Mobile Defense / Excavation	Situational	Worth it if the augment helps hold or clear the objective faster.
Casual Star-Chart Farms	Situational	Often skippable when base abilities already overkill the content.

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