Apex Legends Wiki
Yes, I've heard about criminals posing as Legends, and they're as derivative as they are pathetic. Take this prison break. I admit there are similarities to my modus operandi, but the cloud formations... that's where they went wrong. My gas wafts through the air as if dancing with death. Not like the spray of some hick fireman's two-decade-old extinguisher, as shown here. Anybody with a tenth of my brainpower can see this for what it is: amateurs playing dress-up in a desperate attempt to gain notoriety. But considering your banal, lackluster brand which you dare call 'journalism'? A tenth of my intellect is giving you far too much credit. Do you have any more questions that might illuminate your ignorance? Very well. Enjoy your day.[1]
Toxic Trapper
Real Name Dr. Alexander Maxwell Nox
Alias Dr. Mikhail Caustic[2]
Gender Male
Age 48
Date of Birth Feb 25, 2685
Home World Gaea
Legend Type Defensive.svg Defensive
Tactical Ability Nox Gas Trap.svg Nox Gas Trap
Passive Ability Nox Vision.svg Nox Vision
Ultimate Ability Nox Gas Grenade.svg Nox Gas Grenade
Passive Perk Fortified.svg Fortified
Real-world Info
Voice Actor JB Blanc

Caustic is a Legend that is locked from the base game. He can be unlocked by using digital currency: either Legend Tokens 12,000 or Apex Coins 750, or by buying the Champion Edition.

Caustic is a deadly Defensive.svg Defensive Legend with poisonous gas-based abilities. His tactical ability Nox Gas Trap.svg Nox Gas Trap places canisters that fire out toxic gas when damaged or when an enemy comes near them. His passive ability Nox Vision.svg Nox Vision highlights enemies that are in the gas. His ultimate ability Nox Gas Grenade.svg Nox Gas Grenade throws a grenade that fires toxic gas in a large area around it.


Nox Gas Trap[]

Nox Gas Trap.svg Tactical Q/LB/L1/LB
Nox Gas Trap
Description Place up to 6 canisters that release deadly Nox gas when shot or triggered by enemies.
Cooldown 20 seconds

  • You can hold up to three charges of this ability, and gain one charge every 25 seconds. Up to six traps can be active on the map at once, and you're able to pick up unactivated traps to regain a charge.
  • When an enemy gets close to a trap, it releases a cloud of gas that deals damage per second to enemies caught within, ignoring shields.
    • Lasts 13 seconds
    • Each damage tick deals 5 damage to start, then ramps up by 1 every other tick. (e.g. 5, 5, 6, 6, 7, 7, etc.)
      • Each additional source of gas damage will only increase the DPS by 1.
      • On downed enemies, this damage rate stays at a flat 5/sec.
    • Bullets striking the top of a trap will also cause it to go off. However, shooting the base will destroy it without releasing gas.
    • Enemies will be slowed inside the gas and are unable to sprint. Squadmates aren't affected by this.
  • The traps can be destroyed while midair or before they're fully inflated.
  • The traps can float away when thrown in moving water.

  • Wattson's Interception Pylon.svg Interception Pylons can shoot down traps in mid-air if they would have landed inside the range of the pylon.
  • Wattson's Interception Pylon.svg Interception Pylons cannot destroy traps that are already fully inflated on the ground.
  • The gas can damage both Wattson's Interception Pylon.svg Pylons and Perimeter Security.svg Perimeter Security nodes.
  • Mirage's decoys can trigger the traps to reveal Caustic's location to his squad.
  • Lifeline's D.O.C. Heal Drone.svg D.O.C. Heal Drone will malfunction while inside of the gas and will not be able to heal anyone.
  • Crypto's Surveillance Drone.svg Surveillance Drone can be damaged by the gas.
  • Rampart's Amped Cover.svg Amped barriers can be damaged by the gas.

  • Shooting the base of the trap before it activates will destroy it without releasing the gas.
  • It's good to throw a trap in a smokescreen generated by a Bangalore's Smoke Launcher.svg Smoke Launcher, especially if enemies are hiding in it. This will also highlight enemies in green due to Nox Vision.svg Nox Vision, and allow you an unfettered view of the enemies.
  • When outnumbered or in a sticky situation, throw multiple traps around you. The enemy's bullets will hit your traps, setting them off, and allowing you to escape or heal to stay in the fight.
  • When going through Wraith's Dimensional Rift.svg Dimensional Rift portals, throw a trap at the end to catch enemies off guard trying to get your squad from behind and reveal their position due to your passive.
  • Throwing a trap in front of a door prevents it from opening to that side. You can use this to block doors and protect yourself, or to trap enemies inside an enclosed room. If they break down the door, the trap will activate and you’ll be informed of their location.
  • You can use your traps as smoke bombs, to throw some cover for sniper fire or general confusion.
  • You can also use your traps offensively when an enemy squad is inside a building, and they are extremely weak. They can be thrown inside through doorways and be very deadly if they are in a small space.
  • A squad that manages to get their Caustic to end game (such as Round 6 as it is almost done shrinking) will have the advantage over other squads that don't have a Caustic. Caustic's abilities increase in utility as the play area shrinks. Furthermore, Caustic can prevent scenarios of Heal Off Victories from happening as it's harder to heal in the gas and ring damage.

  • If you throw the trap underneath you, you'll be in its textures, works with teammates too.
  • Throwing the trap under Lifeline's Care Package.svg Care Package before it lands will cause the trap to slowly fly away.
  • Occasionally if you or a teammate touch a recently placed trap, It will begin to slide away.
  • Placing a gas trap right next to a closed-door when the player is right next to the door or when a trap is deploying next to a closed-door that is propped open causes the player located where the trap was deployed to be crushed.
  • Gas traps which are deployed on top of Gilbratar's Dome of Protection.svg Dome of Protection will stay "floating" at their positions after the shield is gone.
  • Throwing a trap on the ground from a high height before the player hits the ground and landing on the trap can remove/reduce the fall stun, similar to Horizon's Spacewalk.svg Spacewalk ability.

  • Nox Vision[]

    Nox Vision.svg Passive
    Nox Vision
    Description You gain threat vision on enemies moving though your gas.

    • Caustic is immune to the effects of Nox Gas whether it belongs to him or an enemy Caustic.
    • Enemies inside the gas created from your Nox Gas Trap.svg Nox Gas Traps and Nox Gas Grenade.svg Nox Gas Grenades abilities are highlighted green, similar to Digital Threat Optics. This vision is obstructed by walls or other obstacles.

  • Your squadmates do not share this vision, so be sure to communicate to them the locations of enemies you can see.
  • Your threat vision doesn't work against other Caustics, forcing you to prioritize them, as they are immune to all Nox Gas effects and they can see your allies even if they are in your gas.

  • Nox Gas Grenade[]

    Nox Gas Grenade.svg Ultimate Z/LB+RB/L1+R1/LB+RB
    Nox Gas Grenade
    Description Blankets a large area in Nox gas.
    Charge time 3 minutes

    • Lasts 15 seconds.
    • Other than the wider area of effect, the gas's function is identical to that of Nox Gas Trap.svg Nox Gas Traps.

  • The grenade can be shot down by Wattson's Interception Pylon.svg Interception Pylon. However, if the grenade has already detonated, the pylon can't block any of the gas, and will even take damage from it.

  • Do not use Nox Gas Grenades and expect them to kill an entire squad. Similar to Bangalore's Rolling Thunder.svg Rolling Thunder, its main utility comes in the fact that enemies are forced to either evacuate the area or suffer the consequences of damage, the inability to sprint and being highlighted by Nox Vision.svg Nox Vision.
    • Since gas deals damage and slows enemies, use Nox Vision.svg Nox Vision to hunt down and kill them while they are weakened. If you have Grenades, throw them into your gas when an enemy is caught-- this combo has the capability of wiping out full squads if enough players are caught in your gas.
  • Using this ability in large, open areas is often a waste. Try to save it for when enemies are occupying a building, a small area, or are hiding behind a cover too dangerous to bypass.
    • You can also use this ability to block chokepoints or cover/punish revives.
  • Try saving this for the last few rounds as his abilities increase in utility as the safe area shrinks. Furthermore, he can prevent scenarios of Heal Off Victories from happening as it's harder to heal in the gas and ring damage.

  • Fortified[]

    Fortified.svg Perk
    Description Incoming damage reduced by 15%. Not slowed by bullets.

    • Take 15% less damage from every attack.
    • Immunity to slow effects from weapon fire.

  • Don't overestimate this ability, 15% less generally translates to surviving 1 more shot.

  • Lore[]

    Alexander Nox used to be one of the brightest scientists in the employ of Humbert Labs, the Frontier’s leading manufacturer of pesticide gases. Nox worked day and night developing new formulas for the glut of pesticides needed to protect the crops that sustained the Outlands. But he soon realized that progress was being hampered by his testing methods. He needed to test on more than just inert tissue: he needed living subjects.

    As he toiled in secret, Nox began to see the beauty in his creations and their ability to destroy anything they touched. But the head of Humbert Labs soon discovered his gruesome experiments, and their confrontation ended with the lab in flames. Now, competing under the name Caustic, he puts his gaseous creations to work in the Apex Games and observes their effects with great interest.


    Alexander Maxwell Nox was born in Hollygrove, Gaea on February 25, 2685 to Katerina Tikacek and Alexander Rutherford Nox. [3] Nox was a spoiled child growing up, [4] and he eventually went to work at the pesticide manufacturer Humbert Labs in Zaldana City, working as a research assistant under Dr. Franklin Humbert. [3] Eventually, Nox began to test his gases on human subjects in secret. [5]

    In 2723, Humbert discovered Nox’s experiments, leading to a confrontation between the two. In retaliation, Nox murdered Humbert and burned the laboratory to the ground. To cover his tracks, he severed two of his fingers and placed them near the charred, dismembered corpse of one of the victims of an experiment of his several weeks prior. [3] He departed the lab with a grappling hook through the ceiling. This incident was witnessed by Pathfinder, who was working as a window washer at Humbert Labs. [6]

    The investigation was overseen by the Gaea Global Task Force, with senior forensics director Dr. Francisco Trejo, chief medical examiner Dr. Tamara Griffin, and lieutenant Victor Maldera. Based on the evidence, Trejo and Griffin moved to close the case. [3] Maldera, however, objected, and soon became obsessed over the case. [6]

    Later on, Nox was involved in an infamous prison break. Witnesses took note of the toxic gases used in the altercation. [7]

    After the incident at Humbert Labs, Nox crafted a new identity under the alias of Dr. Mikhail Caustic. As a part of his facade, he claims to have been born in 2690, graduated from college with a PhD in 2720, received the Heinrich Hammond Award for Excellence in Science in 2725, and took a sabbatical on Solace at an unspecified date. [8] Continuing to research his gases, he entered the Apex Games, where he could test them on living subjects - leaving a considerable trail of bodies in his wake.[5] However, his disguise was a fragile one - his mother, watching an Apex Games match, was able to see right through it, with the only noticeable difference to her being the part in his hair. [4]

    One day, Nox was confronted by Angela Fazia, a reporter for the Outlands Journal tabloid, regarding the prison break. Feigning offense at her accusations of involvement, he insulted her and moved on with his day. [7] [8]

    At some point, Nox allegedly held a tenure with Vinson Dynamics. However, whether or not this is another part of his facade as Mikhail Caustic is unknown. [9] He additionally submitted an application to become a simulacrum after his death. [10]

    Fight Night[]

    One night in the city of Malta, Psamathe, Maldera encountered Pathfinder after the latter accidentally murdered the customer of a local restaurant. Taking the MRVN as evidence, he found video evidence of the arson of Humbert Labs, proving Nox’s survival. Maldera returned to his hunt for Nox with renewed vigor. [6] He was later reassigned to the case. [8]

    Season 2[]

    Nox was noted to have gotten softer and lost his edge after Wattson joined the Apex Games. [11]

    The Broken Ghost[]

    After Loba joined the Apex Games, she solicited the assistance of the other Legends (sans Revenant) to hunt down pieces of an artifact on an alternate Kings Canyon, in the Shadowfall dimension. [12] Nox, however, decided to act as a mole and feed information to Revenant in an obsessive, overprotective attempt to keep Wattson and Crypto away from each other. [13]

    Early into the hunt, Wattson is injured during a sortie in the Shadowfall dimension. Nox stayed at her bedside during a majority of her recovery - much to the surprise of the other Legends, not expecting the seemingly uncaring Nox to be the one to hold vigil. When Loba callously brushes off her injury, Nox attacks and threatens her. [14]

    Immediately after, Revenant arrives and reveals that there is a mole amongst them, sowing distrust. [15] He eventually returns, this time in the guise of Crypto’s seemingly unhackable drone. [16] Caustic seizes the opportunity to frame Crypto, citing his hatred for the Mercenary Syndicate - as both he and Revenant seek revenge against the Syndicate for their own respective fates, it would make perfect sense for them to work together. Crypto rebuts, but the damage is already done. [17]

    Soon after, Nox is confronted by Gibraltar. He shamelessly admits that he is the mole, citing his wish to keep Wattson and Crypto apart, as well as his anger at Loba for digging into everyone’s past. The pair’s ideals clash, with Nox confident that the Legends’ trust has been severed, and Gibraltar resolute that they will come together again. [13]

    Pathfinder's Quest[]

    While Pathfinder is gathering information regarding his creators from Crypto, Nox angrily charges into the latter’s residence, infuriated that Wattson is ignoring him. Crypto traps him using his home security system, but he is released by Pathfinder’s naivete. The two argue, and Pathfinder correctly deduces that the two are step-brothers. [8]

    Season 8 Launch Trailer[]

    Near the wreckage of the IMS Thermopylae, Nox receives a “butt-slap” from Fuse. [18]


    After Mad Maggie's terrorist attack on Kings Canyon, she seeks Fuse’s other arm as recompense. Nox gleefully offers to cut the arm off for him, but leaves after he is refused. [19]

    Nox later obtains clearance from the Mercenary Syndicate to construct a chemical treatment plant on Kings Canyon to extract fuel from the wreckage of the IMS Thermopylae, which was quickly leaking into the Duchess River. [20] However, his true plan was far more sinister - wishing for a larger sample size than the Apex Games, Nox sought to create enough chemicals to attack Solace City. He is confronted by Wattson, whose pleas he ignores in favor of the data he would gather. He unleashes his gases on her in retaliation, but when she collapses, his facade breaks, and he rushes in to save her. Wattson electrocutes him, putting an end to his plans. She tells him that he will have to earn back her trust from now on.

    Wattson agrees to not inform the Syndicate of Nox’s plans, on the condition that he works to become a better man. She additionally questions him about his coughing fits, demanding that she deserves the truth, but he responds that it is none of her concern. [21]

    The Legacy Antigen[]

    After the outbreak of the Medusa epidemic on Olympus, Nox is elated at the idea of watching hundreds of people die. However, this illusion is shattered when Crypto informs him that Mystik, their mother, is one of the patients infected. [22] After verbally sparring with Crypto, an irate Nox agrees to help, directing the Legends to the Carthage spider, an arachnid native to Gaea that contains an agatoxin that can fight the Medusa disease. [23]

    The Legends depart for Gaea on a ship flown by Fuse, with Nox taking the opportunity to mock him for his earlier confrontation with Maggie. [24] He reluctantly pairs up with Crypto for their trek, where the latter asks why he hid himself from their mother for so long. Nox responds that he has a terminal cancer diagnosis, and he was supposed to be dead by that point. Before he can continue, the two are captured in a den of Carthage spiders. [25]

    After waking up, the two find themselves bound alongside Loba and Valkyrie. Nox breaks free using his hammer, intent on fleeing with his own captured spider to create a cure for his cancer. [26] He reluctantly frees Crypto as well, stating that someone will need to take care of their mother when he is gone. He continues his attempt to take a spider for himself, but Valkyrie punches him for this. [27]

    The Legends return to Olympus, where the chemicals from the spiders are able to heavily contribute to the cure, stopping the epidemic. A doctor approaches Nox and Crypto, stating that family members will be allowed to visit a recovering Mystik. As payback for her care for him, Crypto allows Nox to go in his stead. Seeing his mother after so many years, Nox and Mystik have a heartfelt reunion. [28]

    Returning home, he finds a letter waiting for him, declaring that his application to become a simulacrum after death has been declined on the grounds that his mental health screening returned less than positive results. Late that night, he hears a knock on his door, finding a box on his doorstep containing the captured Carthage spider he intended to use as a cancer cure. It had been left there by Wattson and Crypto, with the former hoping that he can become a better person. [29] Whether or not he was able to cure his cancer is unknown.

    Cosmetic Items[]


    There are a total of 71 Legend skins for Caustic; 21 Legendary, 10 Epic, 24 Rare and 16 Common.


    1. Included in the Dark Humor Bundle.
    2. Included in the Silverback Bundle.

    Story of Caustic:

    1. Blackheart: Alexander Nox denies involvement an infamous prison break on Gaia asserting the culprit was merely lookalike. However, the individual who corroborated his account can no longer be located.
    2. Necrosis: Caustic, sensing his death was imminent, at one point sought to become a Simulacrum. His project proposal was rejected after the results of his psychological exam proved troubling.

    • Acid Bubble - Apex Coins 1,000

    • PlayStation+ Pack Chilled Out - February 2021


    Main article: Finisher

    Heirloom Set[]

    Main article: Heirloom

    Caustic's Heirloom Set

    The set contains:

    • A Banner Pose: Hammer Time
    • A Melee weapon skin: Death Hammer - A hammer with a skull at the back equipped with Nox gas.
    • An Intro Quip: "I look forward to getting my hands on you."


    Skydive Emotes[]

    Main article: Skydive Emote


    Main article: Holospray

    Music Packs[]

    Main article: Music Pack

    Loading Screens[]

    Main article: Loading Screen

    Voice lines[]



    • His global identification number on Gaea was ARN0-225P-ER9.[3]
      • Notably, the first three letters could indiciate his father's initials, and the first four numbers are his birthday. The rest of the code is unknown.
    • When he registered in the Apex Games as a competitor, he utilized the name "Dr. Mikhail Caustic".[8]
      • His alibi professed he was born in 2690, educated and graduated in 2715, received his Ph.D. in 2720, and won the Heinrich Hammond Award for Excellence in Science on Psamathe in 2725, before going away on a sabbatical to Solace. Some of this was disproven immediately by Pathfinder. [8]
      • Despite using an alias in the Apex games, Jacob Young (syndicate's Director of PR) refers to him as "Nox".
    • The case file on Gaea indicated Caustic was diagnosed by multiple medical practitioners as a "confirmed sociopath."[8] The term is outdated and widely considered an ableist synonym for a person who has Antisocial Personality Disorder (ASPD).
      • This, or possibly other psychological issues, resulted in the rejection of his self-applied application for being turned into a simulacrum. [29]
    • Caustic has cancer at a stage that he himself considers as incurable. Before the confirmation in "The Legacy Antigen", it had been hinted through a voice line, where he says he has faced his death, right before going into a hacking fit.
    • Although not visible due to his gloves, Caustic is likely missing at least two fingers. On his death record, the examiner states that two severed fingers were found near to the left hand of the corpse and matched Nox's DNA.[3]
    • For some reason, Caustic's eyes previously appeared to glow in the dark under certain circumstances. It is currently unknown why, but it could have had to do with his Nox Vision passive ability.
    • In the discussion getting Revenant into the Apex Games, Caustic was discussed as having gone soft since some girl joined the games, most likely Wattson. [30]
    • As explained by writer Tom Casiello, the Nox Gas is a corrosive gas, that eats through clothes, skin, and metal, unless countered by a chemical compound only he possesses so it doesn't affect him, which explains why the gas still affects Pathfinder, Bloodhound, Octane and Revenant.
      • His gas contains agatoxins from Carthage Spiders, a mammoth class arachnid found on Gaea that emits toxic gas from its abdomen. The agatoxin is similar to the Medusa virus. This was referenced in his death certificate long before he confirmed it himself in "The Legacy Antigen."
    • According to Manny Hagopian, Caustic's name was originally supposed to be "Alexander Gaskins" based on the serial killer Donald Henry Gaskins. It was changed to "Nox" after it was pointed out that "Gaskin" has the word "gas" in it and Manny agreed it felt weird.[31]
    • His gas contains agatoxins from Carthage Spiders, a mammoth class arachnid found on Gaea that emits toxic gas from its abdomen. The agatoxin is similar to the Medusa virus. This was referenced in his death certificate long before he confirmed it himself in "The Legacy Antigen."
    • An inappropriate voice line between Caustic and Crypto was removed in the September 03, 2020 Patch; where Caustic says as thanks to Crypto, “You’ll regret the day you crossed me, gutter rat,” due to the word “rat” being a derogatory term towards Asians.
    • One of Caustic's kill quips, "This is for posterity, so, be honest: how do you feel?", is a reference to The Princess Bride, specifically the scene when Count Rugen was torturing Wesley.[32]




    1. Caustic Loading Screen Text "Blackheart's Rage"
    2. From Pathfinder's Quest, chapter 9
    3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Death Certificate
    4. 4.0 4.1 Reflections
    5. 5.0 5.1 https://www.ea.com/games/apex-legends/about/characters/caustic
    6. 6.0 6.1 6.2 Stories from the Outlands - Fight Night
    7. 7.0 7.1 Season 2 Loading Screen - "Blackheart's Rage"
    8. 8.0 8.1 8.2 8.3 8.4 8.5 8.6 Pathfinder's Quest Chapter 9 - "Oh Brother, Where Art Thou?"
    9. The Broken Ghost Chapter 5 - "The Lying Liar"
    10. The Legacy Antigen Epilogue
    11. 1000?cb=20200214013652
    12. The Broken Ghost Prologue - "The Duplicitous Snake"
    13. 13.0 13.1 The Broken Ghost Chapter 8 - "The Unwavering Protector"
    14. The Broken Ghost Chapter 2 - "The Detached Chaperone"
    15. The Broken Ghost Chapter 3 - "The Liberated Narc"
    16. The Broken Ghost Chapter 6 - "The Oblivious Mole"
    17. The Broken Ghost Chapter 7 - "The Shattered Spirit"
    18. Season 8 Launch Trailer
    19. Armageddon Page 1 - "Armed and Dangerous"
    20. https://www.ea.com/games/apex-legends/news/season-8-chaos-theory-collection-event
    21. A Shock to the System
    22. The Legacy Antigen Part 3 - "She Blinded Me With Science!"
    23. The Legacy Antigen Part 4 - "Getting the Band Back Together"
    24. The Legacy Antigen Part 5 - "Haunted By Broken Ghosts"
    25. The Legacy Antigen Part 7 - "The Terrible Truth About Alexander Nox"
    26. The Legacy Antigen Part 8 - "Abandonment Issues"
    27. The Legacy Antigen Part 9 - "Retribution"
    28. The Legacy Antigen Part 10 - "Legacy Found"
    29. 29.0 29.1 The Legacy Antigen Side Story - Epilogue
    30. https://twitter.com/PlayApex/status/1223312490357981185%5D
    31. Manny Hagopian on Twitter
    32. https://www.reddit.com/r/apexlegends/comments/pdiohx/til_that_caustics_s7_battlepass_kill_quip_is_a/
    33. Prog Wang on Artstation
    34. Kejun Wang on Artstation
    35. William Cho on Artstation
    36. Danny Gardner on Artstation