The Tysis pistol spits out caustic darts that corrode their victims from within.

The Tysis is an Infested sidearm that fires Corrosive b Corrosive darts that deals damage over time, supported by its incredibly high status chance. This allows it to wear down even the heaviest of armor with ease.

Manufacturing Requirements
Time: 24 hrs
Rush: Platinum64 30
MarketIcon Market Price: Platinum64 120 Blueprint2 Blueprints Price:Credits6430,000


This weapon deals primarily Corrosive b Corrosive damage.



Weapon LoadoutsEdit


  • The 81 Corrosive b Corrosive damage is dealt in 3 ticks of 27 damage, over the course of 2 seconds. This allows a single dart to proc multiple times.
  • Tysis needles retain their course after piercing their first target, possibly penetrating multiple targets without losing accuracy.
  • Tysis needles will be invisible if the energy color is Black, making target leading harder as you can't estimate travel speed and deviation effectively.



  • The Tysis' needles may stretch targets if they are already pinned to the wall by another weapon's projectile (like the Boltor Boltor).
  • This is the second Infested weapon available on the Market. The first was the MireInfestedSword Mire.
    • The Tysis is the first Infested sidearm to be non-clan exclusive.
  • The Tysis may derive its name from the suffix "-ptysis", which typically refers to spitting out substances (e.g. Hemoptysis would refer to spitting blood). It may also be based on Phthisis, the ancient Greek name for Consumption, AKA Tuberculosis, which was named such for "eating its victims from the inside".
  • The head of the Tysis vaguely resembles the head of a Goblin shark.


  • In the Codex
  • Tysis With Infested Color Pack
  • Tysis in the Arsenal
  • Tysis

Update HistoryEdit

Update 25.0
  • Tysis Corrosive Damage-over-time will now be apply a single tick to targets the projectile punches through.

Update 24.6

  • Damage changed from 79 Corrosive to 9 Impact, 23 Puncture, 17 Slash and 81 Corrosive delivered in 3 ticks of 27 each over 2 seconds.

Hotfix 23.1.2

  • Fixed a visual bug with the Tysis' dangles getting tangled.

Update 22.12

  • Mastery Rank increased from 4 to 9.
  • Damage increased from 35 to 79.
  • Critical chance increased from 2.5% to 3%.
  • Improved Projectile trail FX.
  • Mag size decreased from 15 to 11.

Update 11.7

  • Introduced.
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