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“It's taking longer than I calculated.”
This page is actively being worked on and may not be completely correct. Please assist in making this page accurate.
Actual stats of heavy attack projectile + trail

Charge attacks from this scythe unleash a wave of acid that mutilates enemies and leaves a trail of corrosive sludge.

The Caustacyst is an Infestation w.svg Infested scythe that deals DmgCorrosiveSmall64.png Corrosive damage, and its heavy attacks create a trail of sludge that damages and staggers enemies who walk into it.


This weapon deals DmgCorrosiveSmall64.png Corrosive damage.




The Caustacyst's blueprint can be researched from the Bio Lab in the dojo.

Manufacturing Requirements
Mutagen Mass.png
Time: 24 hrs
Rush: Platinum64.png 35
MarketIcon.png Market Price: Platinum64.png 230 Blueprint2.svg Blueprints Price:Credits64.png50,000
Bio Lab ResearchClanAffinity64.png3,000
Time: 72 hrs
Prereq: Embolist
Ghost Clan x1   Shadow Clan x3   Storm Clan x10   Mountain Clan x30   Moon Clan x100


Default Combos of Stance or Weapon
Combo Name Attack Multipliers
and Forced Procs
Avg Dmg Multi/s Length Animation
Caustacyst Heavy (unofficial)
(Heavy Attack)
Heavy Attack
Default Melee Attack 600% DmgSlashSmall64.pngKnockdown b.png
Ranged 100% Panel.pngFinisher b.png
Heavy Attack
Default Melee Attack 600% DmgSlashSmall64.pngKnockdown b.png
Ranged 100% Panel.pngFinisher b.png
0.0%/s N/A CaustacystComboHeavy.gif
360° Attack 360°/Spin Attack • Slam Slam Attack • Ranged Ranged Attack • Thrust Thrust Attack
View Full Legend
Key Inputs
Default Melee Attack Basic Melee  (PC default LMB or E; XBX, PSN, and NSW default right button)
Heavy Attack Heavy Attack  (PC default MMB; XBX, PSN, and NSW default left trigger)
Block Block  (PC default RMB; XBX, PSN, and NSW default right trigger)
Up Forward Movement  (PC default W; XBX, PSN, and NSW default tilt up right thumbstick)
Multipliers and Hits
Default Melee Attack
 Attack does double damage 
Default Melee Attack
 2x 100%
 Attack hits twice 
Forced Procs
DmgImpactSmall64.png Knockback
DmgPunctureSmall64.png Frailty
DmgSlashSmall64.png Bleeding
DmgBlastSmall64.png Flashbang
Knockdown b.png Knockdown
Lifted b.png Lifted
Panel.png Stagger
Ragdoll b.png Ragdoll
Finisher b.png Finisher (front, back, or ground) 
DmgImpairSmall64.png Impair (PvP only) 

*Combos that are shared across all stances of the weapon type.
Average Damage Multiplier per second only applies to single target DPS calculations. Note that hits marked as "Slam Attacks" will not apply at the epicenter of a single target hit so these will not be accounted for in avg dmg multi/s calculations.
Combo animation lengths are approximate and are only accurate within a few tenths of a second.


  • When performing a heavy attack, the Caustacyst throws a toxic wave in the direction of the player's aim. This wave will travel up to 35 meters, dealing DmgCorrosiveSmall64.png Corrosive damage to all enemies it hits. The wave will also leave behind a temporary 4 second 20x2m trail of DmgCorrosiveSmall64.png Corrosive pools on the ground that deal 5 DmgCorrosiveSmall64.png Corrosive damage every second to enemies that stand on it.
    • Wave has base damage of ~192 DmgCorrosiveSmall64.png Corrosive.
    • Wave has Damage Falloff, reducing its damage by 100% at the end of wave.
    • Wave range is not affected by Mod TT 20px.png Reach or Mod TT 20px.png Primed Reach.
    • Wave has infinite Punch Through.
    • Corrosive pools will deal damage the moment it contacts the enemy, so enemies may be dealt up to 25 DmgCorrosiveSmall64.png Corrosive damage at base.
    • The wave inherits any elemental damage from mods and can proc their status effects, having an approximated 10% base status chance.
  • Enemies hit by the wave are also staggered, making them vulnerable to melee finishers (default E ) and susceptible to stealth damage multipliers.
    • Enemies stunned by these pools do not have their alert status changed; enemies can be damaged by the pools and still be killed for stealth kills as long as their stun animation is still playing.
    • This allows players to launch a pool, then launch up to 3 more charge attacks before the enemy can become alerted.


  • The Caustacyst is an excellent weapon against the Grineer, allowing for DmgCorrosiveSmall64.png Corrosive and DmgViralSmall64.png Viral to be used at the same time, as well as additional DmgFireSmall64.png Heat to attack their health or DmgElectricitySmall64.png Electricity for extra stunning capabilities.
    • Alternatively, it can be paired with DmgRadiationSmall64.png Radiation for bonus damage against Alloy Armor, pairing with DmgCorrosiveSmall64.png Corrosive's innate armor-peeling to allow for more general use against Grineer enemies.


  • This is the first melee weapon with innate DmgCorrosiveSmall64.png Corrosive damage.


Caustacyst Skins Edit

Patch History[]

Update 26.0 (2019-10-31)

  • Damage increased from 75 Corrosive to 260 (17 Impact, 71 Puncture, 69 Slash, and 103 Corrosive).
  • Range increased from 1 to 2.9.
  • Status Chance increased from 30% to 37%.
  • Critical Chance increased from 5% to 9%.
  • Slam Attack increased from 150 to 780.
  • Slide Attack increased from 150 to 520.
  • Parry Angle set to 60.
  • Follow Through reduced from 0.8 to 0.6.

Update 20.5 (2017-05-17)

  • Fixed Spearmint Scythe skin hand positions being offset on the Anku and Caustacyst.

Hotfix 20.0.7 (2017-03-30)

  • Fixed the Caustacyst’s Corrosive acid projectiles not pausing in Limbo’s Stasis. 
  • Fixed the Caustacyst’s Corrosive acid projectiles from Mirage’s Hall of Mirror clones not being inside Limbo’s Rift when cast and not being affected by the Rift Stasis mechanic.

Hotfix: The Index Preview 4 (2016-10-25)

  • Potential fix for the Caustacyst causing game hitches.
  • Fixed (for real this time) attaining free health by channeling as enemies pass through the Caustacyst goo with Life Strike equipped. Also fixes similar issue with the Zenistar’s charge disc. 

Hotfix: The Index Preview 1 (2016-10-20)

  • Fixed Chat linking the Caustacyst causing a crash.
  • Fixed attaining free health by channeling as enemies pass through the Caustacyst goo with Life Strike equipped. Also fixes similar issue with the Zenistar.
  • Fixed Limbo being able to damage enemies while remaining invincible in the Rift with the Caustacyst or the Zenistar charge attack.

Update: The Index Preview (2016-10-20)

  • Introduced.

See also[]

  • Embolist.png Embolist, a secondary pistol which shares the same theme.