Onos is an 
Entrati wrist-mounted cannon turned into an Incarnon weapon by Albrecht Entrati. Normally capable of shooting fully automatic 
Puncture projectiles, its Incarnon Form transforms into a charging Arm Cannon that primes a 
Radiation wave to discharge 
Heat lasers.
Characteristics
- This weapon deals pure Puncture damage in its normal form and primarily Heat damage in its Incarnon Form.
- Once Incarnon Form is unlocked, landing weakpoint hits fill the Incarnon Transmutation gauge that transforms the Onos into a charging Arm Cannon via the Alternate Fire key.
- The gauge reaches full charge after 12 weakpoint hits, and does not require a full gauge to activate. It will also emit a small, ghost-like wail when the gauge is completely full.
- Additional shots from Multishot count as separate weakpoint hits.
- While charging, the cannon releases a wide beam that inflicts Radiation damage that narrows the longer the charge is held. Upon a full charge, it releases a beam that deals Heat damage and status with 5 meter Punch Through and explodes in a 3 meter radius.
- Initial hit and explosion apply status separately.
- Explosion does not need direct line of sight to deal damage and will penetrate walls.
- Instead of drawing from the Onos's ammo reserves, Incarnon Form gives the Onos a unique "magazine" from 30 rounds per charge to a maximum of 350, indicated by the regular ammo HUD and a bar underneath the reticle.
- If the Alternate Fire key is pressed whether or not the Incarnon magazine is fully expended, the Onos is transformed back into its default state, however this will also fully expend any remaining Incarnon gauge.
- The gauge reaches full charge after 12 weakpoint hits, and does not require a full gauge to activate. It will also emit a small, ghost-like wail when the gauge is completely full.
- As an Incarnon weapon, Onos has 5 evolution tiers with different perks that allow players to customize their Onos's stats.
Advantages over other Secondary weapons (excluding modular weapons):
- Normal Attack (wiki attack index 1)
- High crit chance (26.00%)
- High total damage (220)
- Above average ammo max (210)
- High crit multiplier (2.40x)
- Incarnon Form (wiki attack index 2)
- Above average magazine (20)
- Above average ammo max (210)
- Incarnon Mode Charge Attack (wiki attack index 3)
- High crit chance (38.00%)
- Above average magazine (20)
- Very high total damage (2,200)
- Very high crit multiplier (3.20x)
- Incarnon Mode Charge Radial Attack (wiki attack index 4)
- High crit chance (38.00%)
- High total damage (1,100)
Disadvantages over other Secondary weapons (excluding modular weapons):
- Incarnon Form:
- Explosion inflicts self-stagger.
- Explosion has a headshot multiplier of 1x and cannot trigger headshot conditions.
- Explosion has linear Damage Falloff from 100% to 70% from central impact.
- Normal Attack (wiki attack index 1)
- Low reload speed (2.00 s)
- Very low fire rate (1.40 attacks/sec)
- Very low disposition (●●○○○ (0.70x))
- Incarnon Form (wiki attack index 2)
- Below average crit chance (14.00%)
- Low reload speed (2.00 s)
- Very low total damage (30)
- Below average fire rate (2.00 attacks/sec)
- Below average status chance (18.00%)
- Very low disposition (●●○○○ (0.70x))
- Low crit multiplier (1.60x)
- Incarnon Mode Charge Attack (wiki attack index 3)
- Low reload speed (2.00 s)
- Very low fire rate (0.25 attacks/sec)
- Low disposition (●●○○○ (0.70x))
- Incarnon Mode Charge Radial Attack (wiki attack index 4)
- Low maximum falloff distance (3.0 m)
- Below average reload speed (2.00 s)
- Very low fire rate (0.25 attacks/sec)
- Low disposition (●●○○○ (0.70x))
See WARFRAME Wiki:Stat Comparison/Percentiles for more details.
Acquisition
Onos's blueprint can be obtained from Disruption Armatus on Deimos, whose access requires completion of The Deadlock Protocol and Whispers in the Walls, from Rotation B.
Alternatively it can be purchased from Loid in Sanctum Anatomica for 360 
Vessel Capillaries dropped by Disruption Armatus Demolishers in quantities of 2-3 (5-7 on The Steel Path).
| Item | Source | Chance | Expected | Nearly Guaranteed |
|---|---|---|---|---|
 Blueprint |
Deimos Entrati Disruption / B | 5% | ~ 20 B Rotations | 134 ± 44 B Rotations |
All drop rates data is obtained from DE's official drop tables stored on Module:DropTables/data.
See Mission Rewards#Standard Missions for definitions on reward table rotations.
For more detailed definitions and information,
visit here.
| Manufacturing Requirements | |||||
|---|---|---|---|---|---|
 20,000 |
 Salvage3,000 |
 Necracoil400 |
 Argon Crystal2 |
 Entrati Lanthorn6 |
Time: 12 Hour(s) |
Rush:  50
| |||||
 Market Price: 180
|
 Blueprints Price:N/A
| ||||
Notes
Yareli is unable to activate nor use the Onos' Incarnon Form if she is mounted on 
Merulina.
- Attempting to activate the Onos' Incarnon Form while dismounted, then mounting Merulina immediately afterwards, will force the Onos to revert back to its default form.
- This causes a bug with Onos' firing SFX, it will not play.
- The weapon mode indicator at the bottom right will display that the weapon is in Incarnon Form, but this is a bug, as the Onos is actually in its default form.
- Forcing the Onos to revert to its default form in this manner will not consume any Incarnon charges. Dismounting Merulina will then allow you to immediately activate Onos' Incarnon Form using the unused charges (and any charge you gained firing the Onos in its default form while mounted on Merulina, up to the Onos' Incarnon charge cap).
- It is not known if this specific interaction is intended, or a bug.
- This conflict does not apply if using
Loyal Merulina.
- Attempting to activate the Onos' Incarnon Form while dismounted, then mounting Merulina immediately afterwards, will force the Onos to revert back to its default form.
Evolutions
- When newly acquired from the Foundry, players must acquire 100 kills with the Onos in order to gain access to its Incarnon transformation. The following Evolution tiers, their requirements for unlocking them, and their related perks, are shown below;
- Each challenge additionally grants 5,000 affinity to the weapon, affected by Affinity Boosters.
Evolution I
- Unlock Challenge: Kill 100 enemies with the Onos.
- Weakpoint hits charge Incarnon Transmutation; Alt Fire transmutes. Switching back will expend any remaining charge.
- Incarnon Form changes the weapon from an automatic hand cannon to charging Arm-Cannon. Holding down the trigger releases a wide beam that inflicts Radiation damage. The beam narrows and increases in damage the longer the charge is held. Once fully charged, the Arm Cannon releases a powerful Heat shot with guaranteed status, 5 meter Punch Through, and explodes in a 3 meter radius.
- Damage scales linearly up to 3x damage. Resets after releasing the trigger or firing a charged shot.
- Incarnon Form uses Arm-Cannon animations. Contrary to its appearance, the Onos is still considered a Secondary weapon.
- Incarnon Form changes the weapon from an automatic hand cannon to charging Arm-Cannon. Holding down the trigger releases a wide beam that inflicts
- Mode switching is not instantaneous and has an animation equal to the weapon's reload speed.
- Incarnon Form is activated by filling the Incarnon Transmutation gauge that appears under the reticule by achieving weakpoint hits and then pressing the Alternate Fire button. 12 weakpoints will completely fill the gauge. A full gauge is not required to activate Incarnon Form.
- Charges do not generate on the backpacks of most MOA variants, or vulnerability spots generated by
Sonar or Detect Vulnerability in places other than actual weakpoints. - Weakpoints on corpses or Invulnerable targets do not build charges.
- Individual Multishot bullets can build charges.
- Charges do not generate on the backpacks of most MOA variants, or vulnerability spots generated by
- Instead of drawing ammunition from its reserves, the Onos's Incarnon Form uses a separate "magazine" with each charge producing 30 rounds to a maximum of 350. Once all ammunition is expended, the Onos reverts to its normal form.
- Onos consumes 1 round per tick of damage, then 50 rounds upon releasing the Heat beam. the charged beam will deal full damage even if there's less than 50 charges remaining.
- Incarnon Form's magazine is not affected by mods.
- Incarnon Form is not affected by Ammo Efficiency (such as
Energized Munitions). - Charges and Incarnon Form persists through all activities, such as holstering, bleedout, or being disarmed. However, charges and Incarnon Form are removed upon death.
- Onos consumes 1 round per tick of damage, then 50 rounds upon releasing the
Evolution II
- Unlock Challenge: Kill 8 Eximus with this weapon's Incarnon Transmutation
- Perk 1: Marksman's Hand:
- -30% Recoil
- Affects both modes.
- -30% Recoil
- Perk 2: Rapid Wrath:
- +25% Fire Rate
- Affects both modes.
- +25% Fire Rate
- Perk 3: Swift Deliverance:
- +50% Projectile Speed
- Affects both modes
- +50% Projectile Speed
Evolution III
- Unlock Challenge: Get 5 headshots on Scathing and Mocking Whispers in Albrecht's Laboratories with Primary fire without reloading.
- Hits landed from multishot count towards this challenge.
- Hits while the target is invulnerable count toward this challenge.
- Bounties that task with destroying the Whisper will waypoint its location.
- Perk 1: Extended Volley:
- +10 Magazine Capacity
- Only affects untransformed Onos.
- +10 Magazine Capacity
- Perk 2: Rapid Reinforcement:
- +30% Reload Speed
- Affects untransformed Onos and transformation into Incarnon mode.
- +30% Reload Speed
- Perk 3: Hunter's Rearmament:
- On kill: 10% chance to replenish 10 Ammo
- Only affects untransformed Onos.
- Ammo is replenished to the reserve pool, not to the magazine.
- On kill: 10% chance to replenish 10 Ammo
Evolution IV
- Unlock Challenge: Open 20 Conduits in Disruption on Armatus, Deimos.
- Perk 1: Lethal Lance:
- On Kill: +2.5 Punch Through for 20s
- Affects both modes.
- On Kill: +2.5 Punch Through for 20s
- Perk 2: Incarnon Efficiency:
- Headshots Build +50% more Incarnon Transmutation charge.
- Only affects untransformed Onos.
- Reduces the number of headshots required to fully charge Transmutation to 8.
- Headshots Build +50% more Incarnon Transmutation charge.
- Perk 3: Elemental Excess:
- +20% Status Chance
- -10% Critical Chance
- Affects both modes.
- Effects are added last after mods as a flat number.
Evolution V
- Unlock Challenge: Complete a solo mission with an Incarnon Weapon equipped in every slot.
- Perk 1: Sequential Skullbuster:
- On Consecutive Weakpoint Hits: +30% Headshot Damage. Stacks up to 4x
- Affects only untransformed Onos (Bug)
- On Consecutive Weakpoint Hits: +30% Headshot Damage. Stacks up to 4x
- Perk 2: Impaler's Ferocity:
- On Punch Through Hit: +200% Damage for 10s.
- Bonus is additive to other base damage mods like Hornet Strike (May be a possible bug)
- Bonus is additive to other base damage mods like
- On Punch Through Hit: +200% Damage for 10s.
- Perk 3: Devastation Cascade:
- Hitting enemies in Incarnon Form increases the Critical Chance and Critical Damage of the fully charged blast by +5%. Stacks up to 50.
- Bonuses are additive to mods.
- Hitting enemies in Incarnon Form increases the Critical Chance and Critical Damage of the fully charged blast by +5%. Stacks up to 50.
Trivia
Bugs
- Evolution V, Sequential Skullbuster, does not affect Incarnon mode.
- Galvanized Shot is multiplicative to base damage sources on direct hits from primary fire.
- Non-incarnon projectiles bounce off Scourge's bullet attractor.
- Killing enemies with the Onos' Incarnon Form will give bows ammunition and an ammo capacity of 210.
- Hitting Zephyr's tornadoes will cause it to gain increased critical rate against enemies with primary fire.
- The Onos will occasionally appear on the wrong arm
Gallery
Excalibur with the Onos
Patch History
Hotfix 37.0.4 (2024-10-10)
- Updated the following Incarnon Evolution descriptions to specify “Weakpoint Hits” instead of “Headshots”:
- “X% Critical Chance on Weakpoint Hits”
- “Weakpoint Hits charge Incarnon Transmutation; Alt Fire transmutes. Switching back will expend any remaining charge.”
- “On Consecutive Weakpoint Hits.”
Update 36.0 (2024-06-18)
- Fixed the Onos Evolution V challenge (Complete a solo mission with an Incarnon Weapon equipped in every slot) not completing when entering Extraction in Titania’s Razorwing form.
- Fixed Onos’ Incarnon Form projectiles hitting enemies that are directly behind the player instead of where they are firing.
- Fixed cases of the Onos’ Incarnon Form beam being misaligned from the reticle.
- Also made under-the-hood changes to improve performance issues related to the Onos.
- Fixed the Onos being weirdly rotated when offered in Teshin’s Cave.
Hotfix 35.5.7 (2024-04-17)
- Fixed the Onos’ magazine always using its default color regardless of the color picked by the player.
- Fixed the Onos’ Evolution upgrade screen only showing a portion of the weapon and not the whole thing.
Hotfix 35.5.6 (2024-04-10)
- Fixed Onos’ Evolution V not unlocking after completing a Solo mission with an Incarnon Weapon equipped in every slot (as required) if the player had an Exalted Weapon active while extracting.
- Fixed Onos appearing on Yareli’s left arm instead of the right as intended while using the Loyal Merulina Augment Mod.
- Fixed the Onos having too much flickering in its beam motion.
Hotfix 35.5.3 (2024-04-04)
- Onos Changes & Fixes:
- Increased Impaler Ferocity’s damage buff from +10% to +200% for 10 seconds.
- This is a fixed amount and does not stack up to 10x like the previous “+10% up to 10x stacks”.
- Increased Swift Deliverance’s Projectile Speed buff from +30% to +50%.
- We also fixed an issue where this buff was only being applied to while aiming.
- Fixed the “Sequential Skullbuster” Evolution perk not resetting its consecutive headshot stacks after missing a hit on a new enemy.
- Fixes to the Onos’ Incarnon Form Projectile ring and shot trail VFX positioning.
- Fixed a floating mesh lingering from the Onos while in Incarnon Form after swapping between it with the “Show when Holstered” option is toggled on.
- Fixed the Onos’ transition to/from Incarnon sound FX being out of sync with the animation.
- Fixed the Onos’ holster position being on the thigh instead of on the hand.
- Fixed the Onos not being visible while riding K-Drive/Merulina.
- Increased Impaler Ferocity’s damage buff from +10% to +200% for 10 seconds.
- Fixed a combination of Protea’s Dispensary and Onos’ Incarnon Form causing Primary Weapons to exceed their Maximum Ammo amount.
Hotfix 35.5.2 (2024-03-28)
- Updated the Onos Blueprint description to indicate that they also drop in the Armatus Disruption mission on Deimos.
- Fixed Mirage’s Hall of Mirrors clones unintentionally being able to indefinitely fire Onos’ charge beam.
- Fixed progress not tracking for the Onos’s Evolution IV challenge (Open X Conduits in Disruption on Armatus, Deimos), making it impossible to unlock.
- Fixed an issue with Onos’ projectiles which prevented them from being absorbed into Mag’s Magnetize bubble and causing them to literally bounce off of it into the stratosphere.
- Fixed seeing a PH text when attempting to trigger the Onos’ Incarnon form when on Merulina.
Hotfix 35.5.1 (2024-03-27)
- Fixed Onos having animation misalignment issues during its Incarnon Form blast attack.
- Fixed issues with the Onos’ beam effect having sporadic motion.
Update 35.5 (2024-03-27)
- Introduced.
