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Orthos Prime is an ancient Orokin martial weapon, forged from the purest rubidium making it extremely light-weight.

The Orthos Prime is the primed variant of the Orthos.png Orthos polearm, acting as a direct upgrade.

This weapon can be sold for Credits64.png 5,000.


This weapon deals primarily DmgSlashSmall64.png Slash damage.





Lith, Meso, Neo, and Axi refer to Void Relics  |  (V) Denotes Vaulted Void Relics  |  (B) Denotes Baro Ki'Teer Exclusive Void Relic
Orthos Prime's Relic Drops
GenericWeaponPrimeBlade.png Blade OrthosPrime.png Blueprint GenericWeaponPrimeHilt.png Handle
VoidRelicSilverIcon64.png Neo N16 Uncommon
VoidRelicIronIcon64.png Lith B2 Uncommon (V)
VoidRelicIronIcon64.png Lith B3 Uncommon (V)
VoidRelicIronIcon64.png Lith B5 Uncommon (V)
VoidRelicIronIcon64.png Lith C4 Uncommon (V)
VoidRelicBronzeIcon64.png Meso D1 Uncommon (V)
VoidRelicBronzeIcon64.png Meso I1 Uncommon (V)
VoidRelicSilverIcon64.png Neo C2 Uncommon
VoidRelicGoldIcon64.png Axi A13 Uncommon (V)
VoidRelicGoldIcon64.png Axi B2 Uncommon (V)
VoidRelicGoldIcon64.png Axi C1 Uncommon (V)
VoidRelicGoldIcon64.png Axi M1 Uncommon (V)
VoidRelicGoldIcon64.png Axi V3 Uncommon (V)
VoidRelicIronIcon64.png Lith B6 Uncommon (V)
VoidRelicIronIcon64.png Lith B7 Uncommon (V)
VoidRelicIronIcon64.png Lith H2 Uncommon (V)
VoidRelicIronIcon64.png Lith S10 Uncommon (V)
VoidRelicIronIcon64.png Lith S11 Uncommon (V)
VoidRelicIronIcon64.png Lith S8 Uncommon (V)
VoidRelicBronzeIcon64.png Meso B1 Uncommon (V)
VoidRelicBronzeIcon64.png Meso P5 Common
VoidRelicSilverIcon64.png Neo M4 Common
VoidRelicGoldIcon64.png Axi A6 Common (V)
VoidRelicGoldIcon64.png Axi K2 Common (V)
VoidRelicGoldIcon64.png Axi L2 Common (V)
VoidRelicIronIcon64.png Lith A3 Common (V)
VoidRelicIronIcon64.png Lith D4 Common (V)
VoidRelicIronIcon64.png Lith N10 Common (V)
VoidRelicBronzeIcon64.png Meso A1 Common (V)
VoidRelicBronzeIcon64.png Meso B1 Common (V)
VoidRelicBronzeIcon64.png Meso D1 Common (V)
VoidRelicBronzeIcon64.png Meso D4 Common (V)
VoidRelicBronzeIcon64.png Meso G2 Common (V)
VoidRelicBronzeIcon64.png Meso K1 Common (V)
VoidRelicBronzeIcon64.png Meso K2 Common (V)
VoidRelicBronzeIcon64.png Meso K3 Common (V)
VoidRelicBronzeIcon64.png Meso N4 Common (V)
VoidRelicSilverIcon64.png Neo H1 Common (V)
VoidRelicSilverIcon64.png Neo P3 Common (V)
VoidRelicSilverIcon64.png Neo Z1 Common (V)

Manufacturing Requirements
Time: 12 hrs
Rush: Platinum64.png 50
MarketIcon.png Market Price: Platinum64.png N/A Blueprint2.svg Blueprints Price:N/A


  • The Orthos Prime's Zenurik Pol.svg polarity for its Stance slot makes it ideal for slotting in Mod TT 20px.png Shimmering Blight immediately. While the Orthos Prime can also use Mod TT 20px.png Bleeding Willow, its Naramon Pol.svg polarity will reduce the number of its bonus mod capacity, unless changed using Forma.
  • The Orthos Prime (and its normal counterpart the Orthos) has a unique equipped normal attack animation where it performs thrusting and stabbing attacks against an enemy. This attack is completely replaced upon equipping any of the polearm Stance mods.
  • The Orthos Prime's immense range (especially with Mod TT 20px.png Primed Reach) on top of having decent attack speed allows it to build up combo counter exceedingly fast in a relatively crowded environment, making it a viable candidate to Mod TT 20px.png Blood Rush and Mod TT 20px.png Body Count build to compensate its relatively low stats in late game environment.


  • Prior to Hotfix 9.5.2 (2013-08-12), this weapon used to have the same stats as normal Orthos.
  • Note that the end-blades are not mirrors of each other and seem to have shapes that could fit together. The blades are asymmetrical.
  • In real life, Rubidium is an alkali metal element that is very soft, ductile and silvery-white in color.
    • It is not good for a blade as it's not hard enough to scratch other materials. (Brinell hardness of 0.216MPa, thousands of times worse than iron, which has 490MPa).
    • Being ductile, it is also easy to bend, so it won't keep an edge (or any shape for that matter) when striking an object.
    • Rubidium, as with most alkali metal (like Sodium), oxidizes violently when coming into contact with water, sufficient to produce a small explosion.
      • This could possibly relate how it can inflict a DmgBlastSmall64.png Blast proc, even when contacting land.
    • It can spontaneously combust in air, so it is usually stored in sealed containers with an inert liquid (mineral oil) as a buffer.
    • Despite the Orthos Prime's description, Rubidium is actually denser than Iron, by ~53%.
    • Rubidium has useful properties in laser science, atomic clocks, nuclear physics research, and solar panels. This can lead to speculation that the "rubidium" in the Orthos blade is either some kind of engineered material or it is used to focus/channel something.
  • It is also possible that Rubidium in the universe of Warframe is based on Rubedo, and therefore a different chemical or material altogether.
  • Along the blade reads the text "The longest arm is the law," written in the Tenno alphabet. This might be a hidden joke, referring to the Orthos Prime Handle being substantially longer than the Orthos' handle.



Orthos Prime Skins Edit

Patch History[]

Update 26.0 (2019-10-31)

  • Mastery Rank increased from 2 to 12.
  • Damage increased from 65 to 234.
  • Status Chance increased from 15% to 36%.
  • Critical Chance increased from 10% to 24%.
  • Critical Damage increased from 2x to 2.2x.
  • Slam Attack increased from 130 to 702.
  • Slide Attack increased from 144 to 468.
  • Parry Angle set to 55.
  • Follow Through reduced from 0.8 to 0.6.

Update 25.7 (2019-08-29)

  • Fixed the Orthos (Prime) changing sizes randomly when cycling through skin options for it, predominantly the Forest-Camo and Tekelu skins.

Update 22.6 (2017-12-07)

  • Fixed polearms clipping on some Warframes when using the standard holster position.

Update 18.4 (2016-01-22)

  • Reduced the damage of the Orthos Prime in Conclave.

Hotfix 17.4.1 (2015-09-10)

  • Fixed some weapons that expand on use not properly collapsing when use is finished (Glaive, Orthos, etc).

Update 10.4 (2013-10-16)

  • Fix for Orthos Prime appearing on Dakra Prime blueprint.

Update 10.0 (2013-09-13)

  • Added missing elemental FX to Orthos Prime.

Hotfix 9.5.2 (2013-08-12)

  • Buffs to Orthos Prime, Slightly faster, bit higher base damage. Longer reach.

Update 9.3 (2013-07-26)

  • Orthos Prime elemental FX update.

Hotfix 9.1.5 (2013-07-17)

  • Fix for not being able to build Orthos Prime in Foundry.

Update 9.0 (2013-07-13)

  • Introduced.

Last updated: Update 26.0 (2019-10-31)

See Also[]

  • Orthos.png Orthos, the original counterpart.
  • Prime, the Orokin enhancement to a Warframe or weapon.