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EQUIP a chemical sprayer. FIRE to spray a chemical cloud in all directions around Viper, creating a large cloud that reduces the vision range of players and maximum health of enemies inside of it. HOLD the ability key to disperse the cloud early.
— In-game description

Viper's Pit is an ultimate ability for Viper.


Viper's Pit is a Vision Blocker ability that Viper must equip before casting. Upon doing so a circular indicator will appear in front of her. This crosshair will turn green if it is placed over a viable position to be cast in, and will turn red for unviable positions. Upon casting, Viper will create a large chemical cloud. This cloud will originate and spread out from her location but once fully formed will have its center at the location that the indicator was in on activation.

Once formed, the cloud will remain indefinitely so long as Viper remains inside. If she exits the cloud it will begin to lose integrity, putting it on a timer that will disappear if she reenters the cloud in time, restoring it to full integrity. If Viper does not reenter the cloud before this timer expires, the cloud will expire, causing it to fall down and disappear. Viper herself can cause the ability to end by recasting and holding the ability key.

Vision within the cloud is obscured. Enemy agents who come into contact with the cloud will be affected by Toxin. Enemies within the cloud will be outlined in red once they enter vision range, have their minimap obscured, and do not provide minimap detection to their allies.


If an enemy agent comes into contact with Viper's Pit, their health will decay. They will instantly decay 30 HP upon contact, then continue to decay for 1 HP every 0.1 seconds (10 HP/sec). If no longer in contact with the chemical cloud, the debuff will remain for 1.5 seconds before their health begins to climb back up at a rate of 1 HP every 0.04 seconds (25 HP/sec), up to a maximum of how much HP they would have if they had not been affected, taking any damage and healing taken whilst they were decayed into account.


Note: Values that are not marked as confirmed (i.e. values not provided explicitly in game or from patch notes) are only estimates. Whilst they may not be the true value, they have been tested so that they should be very accurate. Hover over check marks to see sources for confirmed values.

See above for Toxin stats that are relevant to this ability.

Stat Value Confirmed
CustomReload.png Equip time 0.5 seconds Check Mark.png
Orbital Strike.png Max cast radius for cloud's center 7.25 meters Check Mark.png
CustomReload.png Unequip time 1.35 seconds Check Mark.png
Windup.png Deploy time Total 6 seconds
1 second channel time
5 second expansion time
Check Mark.png
Orbital Strike.png Maximum radius 9 meters
Nearsighted.png Vision radius 8.1 meters Check Mark.png
Duration.png Integrity duration 15 seconds Check Mark.png
Windup.png Deactivation time Total 3.25 seconds
1 second holding deactivation command
0.5 second delay
1.75 second collapse time
Check Mark.png

Update History

Note: Updates to Toxin may be relevant to this ability. See Viper's Update History for full details.

  • Buff Improved the system used to place Viper's Pit at targeted ground location


  • Bugfix Nerf Fixed an exploit where, using specific line-ups, it was possible to see inside the pit without being affected by the nearsighted debuff
  • Bugfix Buff Fixed a bug where the pit would sometimes fail to expand through doorways


  • Nerf Bugfix Fixed a bug where Viper’s Pit started forming at the cursor placement point instead of around Viper


  • Buff On cast, the chemical cloud now expands from the location of the indicator instead of from Viper's position
    • This change was a bug that was accidentally shipped[1]


  • Buff Move speed doubled while casting
  • Buff Now fast equips weapon after casting
    • Re-equip times vary per gun—but on average will reduce weapon down time by .4 seconds


  • Buff The area of Viper’s Pit is now shown on her team’s minimap when deployed


  • Buff Max time allowed outside the cloud before it collapses increased 5 >>> 15 seconds
  • Buff Can now hold the ability key to drop the ult early
  • Buff Enemies in Viper’s Pit now have their minimap obscured and do not provide minimap detection to their allies
  • Buff Increased the brightness of the red enemy glow at the edge of Viper's near-sight


  • Bugfix Nerf Fixed Viper being able to animation-cancel Viper’s Pit