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, supported by its incredible status chance that allows it to wear down even the heaviest of armor with ease.

Manufacturing Requirements
Time: 24 hrs
Rush: Platinum64 40
MarketIcon Market Price: Platinum64 120 Blueprint2 Blueprints Price:Credits6430,000


This weapon deals Corrosive b Corrosive damage.



  • Innate Corrosive b Corrosive damage – less effective against Proto Shields.
  • Projectiles have travel time.
  • Extremely low critical chance.
  • Low critical damage.
  • Relatively low fire rate.
  • Fairly high recoil.

Weapon LoadoutsEdit


  • 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.


  • A status chance of 182.50% may be obtained by combining Stunning Speed, Sure Shot, Jolt, Pistol Pestilence, Scorch, and Frostbite. However, there is no benefit to a status chance above 100%.
  • With its high status chance, the Tysis may be used as a softening weapon against Grineer. Corrosive effects stack, allowing another weapon to easily deliver the killing blow.
    • It is recommended to mod the Tysis for Radiation b Radiation damage when dealing with Grineer, allowing it to deal extra damage to NapalmsBombards and Elite troops.
  • Adding Blast b Blast damage makes this weapon ideal for tackling Infested Ancients, as Fossilized enemies take more damage from both elements.


  • The Tysis' needles may stretch targets if they are already pinned to the wall by another weapon's projectile (like the Boltor).
  • This is the second Infested weapon available on the Market. The first was the 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 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
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