Corrosive damage's status effect is Corrosion, which permanently degrades the target's currentarmor (either Ferrite or Alloy) by 25%. The damage of the corroding shot is applied before the Corrosive proc reduces the armor. Corrosion can be applied multiple times to the same target, with each following proc reducing the remaining armor by another 25% of its current (not the initial) value, thereby causing the target's armor to decay at an exponentially decreasing rate, especially with weapons that fire multiple pellets (both by default and through Multishot mods). Against Tenno, the armor degrade is temporary and lasts for 8 seconds.
The enemy corroded by the proc will be covered in a green, electricity-like substance. The status effect FX is permanent, allowing the enemies which have been affected by at least one proc to be identified.
As with all damage types effective against armor, Corrosive damage's type modifier works in two ways: it ignores a percentage of the target's armor, and increases the damage dealt in the same way as a type modifier against hitpoints. Practically speaking, this means that Corrosive damage is only reduced by 25% of a target's whole Ferrite Armor and the base damage is increased by +75%.
Scarab Swarm Charge to transform health into hardened scarab armor. Discharge to blast enemies with a scarab swarm; survivors have their health drained and bestowed on allies.
Range:20 / 22 / 25 / 30 m (cast range) 6 / 10 / 12 / 15 m (heal radius)
Misc:5 m (spread radius)
Info
Inaros becomes immobile and converts his health into Scarab Armor, which permanently increases his base armor by up to 100%. When the ability is charged by holding down the ability key, Inaros loses 29 points of health for every 1% of converted additional bonus armor, for a total of 2,900 health lost to fully charge the armor. Inaros will continue in the animation until releasing the ability key or Inaros only has 2 points of health left but the health drain will stop once the bonus armor has reached 100%.
Health to armor bonus conversion rate is not affected by Ability Efficiency.
The armor bonus is an additive to armor mods; with a fully charged Scarab Armor (100%) and a maxed rank Steel Fiber, Inaros will have a total armor value of: 200 × (1 + 100% + 110%) = 620
Charging Scarab Armor causes Inaros to lose all momentum.
Inaros is immune to stagger, knockback, and knockdown effects while charging Scarab Armor.
The current bonus armor value is displayed on the ability icon and also beside Inaros' health indicator.
Scarab Armor can be removed by casting a swarm projectile, entering a Nullifier bubble, moving too close to a Comba or Scrambus, by being dispelled, or falling into a pit. Scarab Armor bonus can not be removed by enemy weapons fire.
When Scarab Armor is dispelled, all health previously converted into armor is instantly refunded to Inaros, provided his health is not at maximum value.
While Scarab Armor is active and an enemy target is near the aiming reticle, Inaros can consume 25 energy and convert 25% of his total armor bonus into a Swarm Projectile by tapping the ability key.
A Swarm Projectile can not be launched if Scarab Armor value is below 25%.
The Swarm Projectile is launched near the end of the casting animation, giving the player time to adjust the trajectory before the animation ends.
Launching a Swarm Projectile on an enemy that is still under the effects of another Swarm Projectile, will not refresh the debuff.
The Swarm Projectile possesses innate Punch Through but does not bypass obstacles in the environment.
Once in flight, the Swarm Projectile travels up to 20 / 22 / 25 / 30 meters away before dissipating, infesting all enemies with scarabs on contact. Swarmed enemies will flail in panic and receive 100 / 150 / 175 / 200Corrosive damage per second for 6 / 10 / 12 / 15 seconds, during which they cannot move or use special abilities, but can periodically attack. Each swarm host generates an aura with a 6 / 10 / 12 / 15 meter radius that converts damage dealt by Scarab Swarm into health for Inaros and his allies in range. Scarab Swarm can spread all of its effects to any unaffected enemies within a 5 meter radius from a swarm host for 100% of its remaining duration.
Casting range and healing radius are affected by Ability Range, while spread range is not.
Swarm Projectile cast animation of 1.25 seconds is affected by Natural Talent and Speed Drift. Charging scarab armor or launching scarab attack while stationary will prevent movement, however casting scarab attack while moving will not interrupt movement.
It is more energy efficient to cast a Scarab Swarm attack on a single enemy in the middle of a large, clustered group, and allowing the swarm spreading effect to infect all nearby enemies. This is particularly effective against Infested that naturally tend to clump together in groups.
Players can get Scarab Swarm dispelled on purpose, such as by running into a Nullifier bubble, to instantly get up to 2,900 points of health back.
Danse Macabre Erupt with a multitude of Eidolon energy beams and sweep a circle of death around Revenant. The beams will modify their Damage Type to target select defenses, while incoming damage is redirected back into the beams. Hold fire to boost Status Effects and Damage, at the cost of increased energy consumption. Thralls killed by this leave overshield pickups.
Misc:9 (number of beams) 100 m (sweep area) 1 rev/sec (rotation speed) 20% (status chance) 40% (boosted status chance) 50 (overshield points per pickup)
Info
Revenant unleashes the might of the Eidolon essence emanating from his left arm, dispersing the Sentient energy into 9 energy beams as he levitates and spins counterclockwise. Energy beams oscillate in angle vertically as Revenant rotates, rapidly sweeping across a 100 meter radius area with rotation speed 1 rev/sec in a pentagonal shape. Each energy beam has a thickness of 0.03 / 0.05 / 0.08 / 0.1 meter radius and continuously inflicts 500 / 750 / 1,000 / 1,250 damage per second with a 20% status chance to all enemies caught in its path.
Number of energy beams and sweep area are not affected by mods.
Energy beams possess innate Punch Through, allowing them to bypass terrain and obstacles in the environment.
Energy beams cannot hit enemies standing above Revenant's left arm due to the oscillation pattern.
While active, all damage received by Revenant is stored into a total damage pool, then gradually transferred to each energy beam as additional damage per second.
Damage stored is tracked by the buff icon beside the shield and health bars.
Revenant is able to move with reduced movement speed while channeling Danse Macabre. Speed the same as Revenant's running speed (without sprint) and affected only by Hobbled Dragon Key.
Holding the fire button (default LMB ) increases the beams' damage per second to 1,000 / 1,500 / 2,000 / 2,500, status chance to 40%, and beam radius to 0.05 / 0.1 / 0.15 / 0.2 meters, while also increasing energy drain to 40 energy per second.
Boosted damage per second is affected by Ability Strength.
Boosted beam radius is affected by Ability Range.
Boosted energy drain is affected by both Ability Efficiency and Ability Duration.
Energy beams autonomously adapt their damage type to the attributes of the enemies they hit: Corrosive against armored enemies, Magnetic against shielded enemies, and Gas against enemies with infested flesh.
Corrosive status effect permanently reduces a target's current armor by 25%.
Magnetic status effect reduces a target's current and maximum shields by 75% for 4 seconds.
Gas status effect spawns a toxic cloud that deals Toxin damage and procs a Toxin status to enemies who stand in it.
Danse Macabre consumes 20 energy per second while active and will remain active until Revenant's energy is depleted, or the ability is deactivated by pressing the ability key again.
Enthralled enemies killed by this ability drop a unique pickup that grants 50Overshields when collected by Revenant or his allies.
Energy pillars explode to inflict damage radially when struck by Danse Macabre lasers.
Damage reflected by Mesmer Skin also accumulates into Danse Macabre's energy beam damage pool.
Reave has 50% reduced energy cost and can be cancelled at any time during Danse Macabre. Casting speed becomes instantaneous and allows limited steering with the movement keys during the dash.
Revenant cannot cast Enthrall or Mesmer Skin, perform parkour Maneuvers or general interactions while channeling this ability.
Revenant is immune to knockdown while channeling this ability.
Casting Danse Macabre is a full body animation that interrupts grounded movement and other actions.
Revenant visually extends his left arm outward and his right arm upward, as he hovers and rotates in place. Energy beams are generated and spread throughout his left arm, while droplets and gaseous energy particles emit from both hands. When the fire button is held, a surge of Sentient energy resembling Enthrall's energy pillars continuously erupt skyward from beneath Revenant's feet.
Energy beams, energy particles, and energy surge color tinting are affected by Revenant's chosen Warframe energy color.
Spores Inflict a target with a pox of Corrosive spores. Spread spores to nearby enemies by destroying them or killing their host. The longer the Spore spreads, its damage will increase.
Range:30 / 40 / 50 / 60 m (cast range) 10 / 12 / 14 / 16 m (spread radius)
Misc:∞ (duration) 7 (damage growth enemy cap) 0.5 s (damage decay interval) 2 / 2 / 3 / 3 (initial spores) 1 (transmitted spore) 3 (max spores per enemy via spread) 12 (max spores per enemy via recast) 4.0x (miasma damage multiplier)
Info
Saryn infects an enemy target within 30 / 40 / 50 / 60 meters with 2 / 2 / 3 / 3 virulent spores for an unlimited duration. Each individual spore inflicts Corrosive damage per second with a 50%Corrosivestatus chance, lasting until the spores themselves or the infected enemy is destroyed.
Spores duration and number of initial spores are not affected by mods.
Saryn's disease spreads its infection rapidly, grows evermore lethal, and decays in the absence of hosts over the course of the epidemic:
Shooting or hitting a spore directly bursts its membrane to release infectious pus, which regrows the spore on its host and transmits 1 spore to all nearby enemies within 10 / 12 / 14 / 16 meters; infected enemies can carry up to 3 spores via transmission from another enemy.
Transmitted spore and max spores per enemy via spread are not affected by mods.
Spores can spread by directly bursting them with weapons, abilities, and Bullet Jump. Enemy attacks can also burst spores on contact.
Spread bypasses obstacles in the environment and damage does not diminish with distance.
All spores on an infected enemy will burst and spread if any of the following conditions are met:
Spores' initial target is killed by any source.
Players landing the killing blow on any infected enemies.
Infected enemies are killed by Molt's explosion damage.
Saryn's weapons hitting anywhere on the infected enemies' body while Toxic Lash is active.
Infected enemies are killed by any source while sickened by Miasma.
Spores do not spread if enemies infected via transmission are killed by Spores' damage per second alone.
When the outbreak first begins, damage per second starts at 6 / 8 / 8 / 10Corrosive damage; for every second Spores remain active, damage per second increases by 1 / 1.25 / 1.5 / 2Corrosive damage per infected enemy, up to a damage growth cap of 7 infected enemies. Current damage per second is uniform across all active spores and will apply to newly infected enemies.
Initial damage and damage growth per second are affected by Ability Strength.
Damage growth enemy cap is not affected by mods.
Amount of infected enemies is unlimited, only damage growth is capped.
Current damage per second is hard-capped at 70,000 damage.
While Spores is active, a stylized infection meter appears above Saryn's ability icons on the HUD, indicating the current damage per second and tracks the number of infected enemies in the mission affected by spores belonging to the player.
When zero infected enemies remain, Spores' current damage per second is instantly reduced by 20% then decays at 10% of the new total every 0.5 seconds until it reaches the initial damage amount. Damage decay stops when at least one enemy is infected by Spores.
Reset decay is inversely affected by Ability Strength (e.g., more strength reduces amount consumed.)
Damage decay rate is inversely affected by Ability Duration (e.g., more duration reduces amount of damage decay per half second.)
Nullifying effects (such as entering Sanctuary Onslaught Data-Conduits) increases the decay rate to 30% per half second.
Damage decay interval is not affected by mods.
Current damage per second is visibly subtracted from the meter whilst a red flashing "decaying" warning message replaces the counter for number of infected enemies.
The infection meter disappears when it reaches the initial damage amount.
If Spores is still active, recasting Spores on any enemy consumes 20% of current damage per second from the infection meter and casts Spores for 50% reduced energy cost. Recasting on an infected enemy grows a new set of spores on the target, which carries up to 12 spores via recasting Spores on it.
Reset decay is inversely affected by Ability Strength (e.g., more strength reduces amount consumed.)
Recast energy discount and max spores per enemy via recast are not affected by mods.
All spores destroyed via melee weapon contribute to the melee combo counter.
Ability Synergy:
Toxic Lash can make spores burst with every attack, even without direct hits.
Miasma deals 400% damage to enemies affected by Spores.
Spores is a one-handed action. As such, it can be used while performing various maneuvers and actions without interruption.
If the initial target dies before the spores appear, energy used for Spores will be refunded.
Venom Dose is a Warframe Augment Mod for Saryn that allows Spores to be held on cast, creating a wave of energy traveling outward from the user that temporarily grants the caster and nearby allies additional Corrosive damage to all attacks.
Cast on an enemy in the middle of a crowd and promptly kill it or use one of the many methods to spread the spores.
Each spore inflicts damage per second and Corrosive status effect on proc, which is tripled on an enemy carrying three spores from a max rank Spores cast or accumulated from transmission from other infected enemies.
Infect at least 7 enemies to maximize damage growth, allowing Spores to reach higher damage per second counts over time.
Mod for Ability Strength to increase initial damage, damage growth per enemy, status chance, while reducing the reset decay on recast or on zero infected present.
Status chance can reach 100% with 200% Ability Strength.
Recast Spores several times to inflict an enemy with up to 12 spores to strip its Armor quickly, deal more damage per second instances, and provide more spores to spread.
However, note that each recast will consume a percentage of damage per second stored in your infection meter.
Using melee to hit enemies makes it easier to burst spores, compared to firearms, especially with Range mods, e.g. Reach (Primed).
Use Toxic Lash to spread spores on an infected enemy on every hit using your gun or melee.
Cast Miasma to inflict quadruple damage to all enemies infected by Spores within range.
Can be used to destroy Corpus cameras and (active) turrets. A spore will appear but a camera dies on the first tick.
When combined with AoE weapons (such as Ignis and Embolist, which both deal DoT, increased by Saryn's passive), the spores will pop very easily, quickly spreading Corrosive procs.
The ability synergizes well with Nova's Molecular Prime, both spreading and weakening enemies until one dies and causes a series of chain explosions and effectively quartering enemy survivability.
Spores is excellent for bosses with shields to prevent them from recovering.
This is quite effective against Ambulas since it targets the torso and, like all MOAs, he takes three times damage on that body part.
Because Corrosive procs reduce the armor of an enemy by 25% of their current armor, each proc against an enemy removes less armor points than its previous proc, and (if not for rounding) would theoretically never reduce armor to 0. The number of procs it takes to get down to below 1 depends on the initial armor value of the enemy. For the following examples, keep in mind these colored benchmarks:
The background colors of the above table mark 10% damage reduction increments.
As Corrosive procs are inflicted against the following hypothetical enemies, they will be brought lower and lower down the rainbow spectrum in damage reduction. The way the remaining armor is calculated is an exponential function as follows:
Remaining Armor = Initial Armor × 0.75Procs
Initial Armor is the original armor of your enemy.
Procs is the number of times that Corrosive procs occur on the enemy.
Were this chart to fill in the gaps and continue, the trend would reveal that every 8 procs reduces the armor value of the current target by almost exactly 90%. This means for players fighting high level Grineer enemies (for reference, a level 120 Heavy Gunner has roughly 10000 armor), Corrosive procs are nearly essential to kill them, and to get a sufficient number of procs on the enemy, a weapon with both high Status Chance and high Fire Rate would be best.
The complete removal of a target's armor occurs when its armor value falls below 1. This may be desirable to remove the damage type modifiers of the target's armor type, or it may be unwanted in the case of Corrosive damage against Ferrite armor, as this means losing the +75% damage bonus. Either way, it is important to consider when this event is expected to occur.
Based on the previous equation describing the relationship between number of procs, initial armor and remaining armor, one can calculate for any given armor value the number of procs required to deplete it completely:
Procs > 8 log10 (Initial Armor)
Conversely, one can calculate for any given number of procs the greatest armor value which it can deplete completely:
Initial Armor < (4/3)Procs
The bottom line of this for fighting armored targets with Corrosion effects is that, since the number of shots required to deplete the target's armor grows slower with enemy level than the number of shots required to deplete the target's health, armor depletion will occur more often and already at higher relative amounts of health left as enemy level increases, for any fixed weapon setup which can proc Corrosion.
This Nova is currently using a Corrosive-modded Brakk; Corrosive procs should reduce armor. Notice Kril's Yellow health bar, showing he has armor.
After proccing the Corrosive effect on Kril several times, his health bar turned red. This suggests that Corrosive procs can reduce armor to zero permanently.
Corrosive Damage is one of the six secondary elemental damage types, composed of 
Electricity and 
Toxin damage. It is immensely useful against 
Grineer Ferrite Armor and Fossilized 
Infested creatures, but fares poorly against the Proto Shields of some elite 
Corpus enemies.
Edit
Corrosive spores. Spread spores to nearby enemies by destroying them or killing their host. The longer the Spore spreads, its damage will increase.
Valkyr with 
Steel Fiber
Atlas with 
Chroma with 
Frost (
Frost Prime) or 
Nidus with 
Rhino Prime with 
Excalibur Prime or 
Excalibur Umbra with 
Excalibur or 
Wukong with 
Inaros with 
Rhino with 
Nezha with 
Saryn with 
Oberon, 
Ash (
Ash Prime) or 
Gauss with 
Khora, 
Ember Prime or 
Gara with 
Oberon Prime, or 
Ember, 
Equinox, or 
Volt Prime with 
Hydroid, 
Limbo, 
Loki (
Loki Prime), 
Mag (
Mag Prime),
Mesa, 
Mirage, 
Nekros, 
Nova (
Nova Prime), or 
Ivara with 
Nyx Prime or 
Vauban with 
Banshee, 
Volt, 
Nyx, 
Trinity, or 
Zephyr with 
Impact • 
Puncture • 
Slash
Cold • 
Heat • 
Blast • 
Gas • 
Magnetic • 
Radiation • 
Viral
Tau • 
True • 
Void
