Arcane Steadfast is an Arcane Enhancement for Warframes that provides a chance for the next 3 Ability casts to not cost Energy upon using an Ability.

Effect[]

Rank	Chance	Number of Abilities
0	+5%	3
1	+8%	3
2	+11%	3
3	+14%	3
4	+17%	3
5	+20%	3

Acquisition

Arcane Steadfast can be obtained from Mirror Defense as a Rotation C reward. Alternatively it can be purchased from Otak for 60  Belric Crystal Fragment and  Rania Crystal Fragment each, for a total of 1,260 of each for max rank.

All drop rates data is obtained from DE's official drop tables. See Mission Rewards#Standard Missions for definitions on reward table rotations.
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Notes[]

• Channeled Abilities will only have their initial cast be free. Energy drain works as normal.
• Toggleable abilities, such as  Pacify & Provoke or  Spectral Scream can trigger the Arcane during initial ability activation.
• Abilities that have no initial energy cost AND cost less than 3 modded energy per second will not proc nor drain the charges of the Arcane, such as  Mach Rush,  Pulverize, or  Parasitic Link.
• Stacks with  Inner Might, allowing for an effective fourth charge when both effects are active.
  • Likewise with Inner Might, Arcane Steadfast doesn't have any effect when casting Railjack abilities.
• Abilities that have had their cost negated by Arcane Steadfast will not be able to activate Arcane Steadfast again when cast. Thus, it is impossible to experience an extended chain of zero-cost ability casts refreshing the Arcane; there must be at least one non-negated ability cast in between each set of three negated abilities.
• When Arcane Steadfast is active, 3 orbs of energy will orbit the Warframe, decaying after each "charge" is used.
• As neither  Hildryn nor  Lavos use energy, this Arcane has no benefit for them.

Tips[]

• At max rank is expected to activate ~67% of the time after 5 casts and ~90% after 10 ability casts. By nature of negating the cost of abilities, the energy saved by this Arcane is amplified on builds with negative Ability Efficiency.
• Ths Arcane works best on warframes with spammable, low-cost abilities to activate the Arcane and use the charges for higher-cost abilities:

Patch History[]

Arcanes Edit
Warframe Primary Secondary Melee Operator Amp Kitgun Zaw Teralyst/Orphix  Arcane Consequence •  Arcane Ice •  Arcane Momentum •  Arcane Nullifier •  Arcane Tempo •  Arcane Warmth •  Arcane Deflection •  Arcane Healing •  Arcane Resistance •  Arcane Victory Gantulyst/Orphix  Arcane Acceleration •  Arcane Agility •  Arcane Awakening •  Arcane Eruption •  Arcane Guardian •  Arcane Phantasm •  Arcane Strike •  Arcane Aegis •  Arcane Precision •  Arcane Pulse •  Arcane Ultimatum Hydrolyst/Orphix  Arcane Trickery •  Arcane Velocity •  Arcane Arachne •  Arcane Avenger •  Arcane Fury •  Arcane Rage •  Arcane Barrier •  Arcane Energize •  Arcane Grace Arbitrations  Arcane Blade Charger •  Arcane Bodyguard •  Arcane Pistoleer •  Arcane Primary Charger •  Arcane Tanker Isolation Vaults  Theorem Contagion •  Theorem Demulcent •  Theorem Infection The Zariman  Molt Augmented •  Molt Efficiency •  Molt Reconstruct •  Molt Vigor Conjunction Survival  Arcane Blessing •  Arcane Rise Mirror Defense  Arcane Double Back •  Arcane Steadfast Duviri  Arcane Reaper •  Arcane Intention •  Arcane Power Ramp Ascension  Arcane Battery •  Arcane Ice Storm The Steel Path  Primary Deadhead •  Primary Dexterity •  Primary Merciless The Zariman  Fractalized Reset Conjunction Survival  Primary Frostbite Mirror Defense  Primary Plated Round Duviri  Longbow Sharpshot •  Primary Blight •  Primary Exhilarate •  Primary Obstruct •  Shotgun Vendetta The Steel Path  Secondary Deadhead •  Secondary Dexterity •  Secondary Merciless The Zariman  Cascadia Accuracy •  Cascadia Empowered •  Cascadia Flare •  Cascadia Overcharge Conjunction Survival  Conjunction Voltage Mirror Defense  Secondary Encumber •  Secondary Kinship Duviri  Akimbo Slip Shot •  Secondary Shiver •  Secondary Outburst Ascension  Secondary Surge •  Secondary Fortifier Cavia  Melee Animosity •  Melee Crescendo •  Melee Duplicate •  Melee Exposure •  Melee Fortification •  Melee Influence •  Melee Retaliation •  Melee Vortex Ascension  Melee Afflictions The Quills  Magus Husk •  Magus Vigor •  Magus Cadence •  Magus Cloud •  Magus Replenish •  Magus Elevate •  Magus Nourish Vox Solaris  Magus Overload •  Magus Glitch •  Magus Revert •  Magus Firewall •  Magus Drive •  Magus Lockdown •  Magus Destruct •  Magus Anomaly •  Magus Melt •  Magus Accelerant •  Magus Repair The Zariman  Emergence Dissipate •  Emergence Renewed •  Emergence Savior Duviri  Magus Aggress The Quills  Virtuos Null •  Virtuos Tempo •  Virtuos Fury •  Virtuos Strike •  Virtuos Ghost •  Virtuos Shadow Vox Solaris  Virtuos Forge •  Virtuos Trojan •  Virtuos Spike •  Virtuos Surge The Zariman  Eternal Eradicate •  Eternal Logistics •  Eternal Onslaught Solaris United  Pax Bolt •  Pax Charge •  Pax Seeker •  Pax Soar Isolation Vaults  Residual Boils •  Residual Malodor •  Residual Shock •  Residual Viremia Ostron  Exodia Triumph •  Exodia Valor •  Exodia Brave •  Exodia Force •  Exodia Hunt •  Exodia Might Plague Star  Exodia Contagion •  Exodia Epidemic
Eidolon • Arcane Helmets • Ostron • Operator • Amp • Solaris United • The Holdfasts • The Quills • Vox Solaris