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Dota 2

Viper: change history

19 changes across 5 patches (Dec 15, 2025 to May 6, 2026), newest first. Nerf Radar tracks the 10 most recent official updates for Dota 2, back to Dec 15, 2025.
Buff 7Nerf 5Adjust 7
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  1. Dota 2: Gameplay Update 7.41c (May 6, 2026)Nerf 1Official notes ↗
    Nerf
    Nosedive · Cooldown
    Cooldown on Viper's Nosedive increases from 20s to 25s.
    20s→25s
    Source line
    Cooldown increased from 20s to 25s
  2. Dota 2 Patch 7.41Buff 3Nerf 1Adjust 4Official notes ↗
    Buff
    Agility gain
    Viper's Agility gain increases from 2.7 to 2.9.
    2.7→2.9
    Source line
    Agility gain increased from 2.7 to 2.9
    Nerf
    Base Attack Speed
    Viper's Base Attack Speed decreases from 120 to 110.
    120→110
    Source line
    Base Attack Speed decreased from 120 to 110
    Buff
    Predator · Base Damage per Missing Health Percentage
    Base Damage per Missing Health Percentage on Viper's Predator increases from 0.15 to 0.25.
    0.15→0.25
    Source line
    Base Damage per Missing Health Percentage increased from 0.15 to 0.25
    Adjust
    Corrosive Skin
    Aghanim's Scepter now also gradually increases Corrosive Skin's magic resistance and damage per second while he is in Nethertoxin, up to 50% increased effect after 4s.
    Source line
    Aghanim's Scepter now also gradually increases Corrosive Skin's magic resistance and damage per second while he is in Nethertoxin, up to 50% increased effect after 4s
    Adjust
    Talents
    Level 10 Talent +10% Poison Attack slow/damage replaced with +15 Corrosive Skin Damage Per Second.
    Source line
    Level 10 Talent +10% Poison Attack slow/damage replaced with +15 Corrosive Skin Damage Per Second
    Adjust
    Talents
    Level 15 Talent +20 Corrosive Skin Damage Per Second replaced with +15% Poison Attack Slow / Damage.
    Source line
    Level 15 Talent +20 Corrosive Skin Damage Per Second replaced with +15% Poison Attack Slow / Damage
    Adjust
    Talents
    Level 15 Talent +30 Nethertoxin Min/Max Damage replaced with +20/40 Nethertoxin Min/Max Damage.
    Source line
    Level 15 Talent +30 Nethertoxin Min/Max Damage replaced with +20/40 Nethertoxin Min/Max Damage
    Buff
    Talents · Level 20 Talent Predator Damage Per Missing Health
    Viper's level 20 talent Predator Damage Per Missing Health increases from +0.3 to +0.35.
    +0.3→+0.35
    Source line
    Level 20 Talent Predator Damage Per Missing Health increased from +0.3 to +0.35
  3. Dota 2: Gameplay Update 7.40c (Jan 21, 2026)Buff 1Nerf 1Adjust 1Official notes ↗
    Adjust
    Corrosive Skin · Damage per second
    Damage per second on Viper's Corrosive Skin changes from 8/16/24/32 to 10/15/20/25.
    8/16/24/32→10/15/20/25
    Source line
    Damage per second rescaled from 8/16/24/32 to 10/15/20/25
    Buff
    Talents · Level 20 Talent Predator Damage Per Missing Health
    Viper's level 20 talent Predator Damage Per Missing Health increases from +0.25 to +0.3.
    +0.25→+0.3
    Source line
    Level 20 Talent Predator Damage Per Missing Health increased from +0.25 to +0.3
    Nerf
    Talents · Level 20 Talent Viper Strike DPS
    Viper's level 20 talent Viper Strike DPS decreases from +80 to +70.
    +80→+70
    Source line
    Level 20 Talent Viper Strike DPS decreased from +80 to +70
  4. Dota 2: Gameplay Update 7.40b (Dec 23, 2025)Nerf 2Adjust 2Official notes ↗
    Adjust
    Talents
    Level 10 Talent +20 Corrosive Skin Damage Per Second replaced with +10% Poison Attack Slow/Damage.
    Source line
    Level 10 Talent +20 Corrosive Skin Damage Per Second replaced with +10% Poison Attack Slow/Damage
    Adjust
    Talents
    Level 15 Talent +15% Poison Attack Slow/Damage replaced with +20 Corrosive Skin Damage Per Second.
    Source line
    Level 15 Talent +15% Poison Attack Slow/Damage replaced with +20 Corrosive Skin Damage Per Second
    Nerf
    Talents · Level 15 Talent Nethertoxin Min/Max Damage
    Viper's level 15 talent Nethertoxin Min/Max Damage decreases from +40 to +30.
    +40→+30
    Source line
    Level 15 Talent Nethertoxin Min/Max Damage decreased from +40 to +30
    Nerf
    Caustic Bath · Corrosive Skin · Max bonus effect
    Max bonus effect on Viper's Caustic Bath · Corrosive Skin decreases from 100% to 75%.
    100%→75%
    Source line
    Max bonus effect decreased from 100% to 75%
  5. Dota 2 Patch 7.40Buff 3Official notes ↗
    Buff
    Poison Attack · Mana Cost
    Mana Cost on Viper's Poison Attack decreases from 22 to 20.
    22→20
    Source line
    Mana Cost decreased from 22 to 20
    Buff
    Talents · Level 20 Talent Predator Damage Per Missing Health
    Viper's level 20 talent Predator Damage Per Missing Health increases from +0.2 to +0.25.
    +0.2→+0.25
    Source line
    Level 20 Talent Predator Damage Per Missing Health increased from +0.2 to +0.25
    Buff
    Caustic Bath · Corrosive Skin · Time to max effect
    Time to max effect on Viper's Caustic Bath · Corrosive Skin increases from 4s to 5s.
    4s→5s
    Source line
    Time to max effect increased from 4s to 5s

Each step links to the full patch breakdown and to Valve's official notes. Changes listed under a general heading such as "Bug fixes" are not included here; search to find every mention.