Nerf Radar › Dota 2 › History › Io
Dota 2

Io: change history

19 changes across 5 patches (Dec 15, 2025 to Sep 15, 2026), newest first. Nerf Radar tracks the 10 most recent official updates for Dota 2, back to Dec 15, 2025.
Buff 4Nerf 4Adjust 9New 1Removed 1
Search all mentions →
RSS feed
  1. Dota 2: Gameplay Update 7.41f (Sep 15, 2026)Nerf 1Official notes ↗
    Nerf
    Talents · Level 15 Talent Spirits Damage
    Io's level 15 talent Spirits Damage decreases from +50% to +40%.
    +50%→+40%
    Source line
    Level 15 Talent Spirits Damage decreased from +50% to +40%
  2. Dota 2: Gameplay Update 7.41c (May 6, 2026)Nerf 1Adjust 1Official notes ↗
    Nerf
    Tether · HP/Mana Transfer
    HP/Mana Transfer on Io's Tether decreases from 60/80/100/120% to 55/75/95/115%.
    60/80/100/120%→55/75/95/115%
    Source line
    HP/Mana Transfer decreased from 60/80/100/120% to 55/75/95/115%
    Adjust
    Spirits
    Now remembers the radius of the spirits between casts.
    Source line
    Now remembers the radius of the spirits between casts
  3. Dota 2: Gameplay Update 7.41a (Mar 27, 2026)Adjust 2Official notes ↗
    Adjust
    Equilibrium · Max Damage Amp and Max Heal Amplification
    Io's Equilibrium: Max Damage Amp and Max Heal Amplification decreased from 5 + 0.5% per level to 4 + 0.4% per level.
    5 + 0.5% per level→4 + 0.4% per level
    Source line
    Max Damage Amp and Max Heal Amplification decreased from 5 + 0.5% per level to 4 + 0.4% per level
    Adjust
    Talents · Level 25 Talent Attack Tethered Ally's Target Damage
    Io's level 25 talent Attack Tethered Ally's Target Damage decreases from 75% to 50%.
    75%→50%
    Source line
    Level 25 Talent Attack Tethered Ally's Target Damage decreased from 75% to 50%
  4. Dota 2 Patch 7.41Buff 1Adjust 2New 1Removed 1Official notes ↗
    Removed
    Removed Wellspring innate ability.
    Source line
    Removed Wellspring innate ability
    New
    Equilibrium
    New innate ability.
    Source line
    New innate ability
    • Io always has bonus Outgoing Damage Amp which linearly scales with its health, reaching a maximum of 5% + 0.5% per level at 100% Health. At the same time, Io has Health Restoration and Healing Amplifications which also linearly scale with its health, but reach a maximum of 5% + 0.5% per level at zero Health
    Adjust
    Overcharge
    Now also provides 35/60/85/110 Attack Speed and 8/10/12/14% Spell Amplification to Io and any tethered Allies.
    Source line
    Now also provides 35/60/85/110 Attack Speed and 8/10/12/14% Spell Amplification to Io and any tethered Allies
    Buff
    Talents · Level 10 Talent Strength
    Io's level 10 talent Strength increases from +7 to +8.
    +7→+8
    Source line
    Level 10 Talent Strength increased from +7 to +8
    Adjust
    Talents · Level 25 Talent Relocate Cast Delay Reduction
    Io's level 25 talent Relocate Cast Delay Reduction increases from 1.5s to 2s.
    1.5s→2s
    Source line
    Level 25 Talent Relocate Cast Delay Reduction increased from 1.5s to 2s
  5. Dota 2 Patch 7.40Buff 3Nerf 2Adjust 4Official notes ↗
    Buff
    Base Strength
    Io's Base Strength increases from 17 to 19.
    17→19
    Source line
    Base Strength increased from 17 to 19
    Nerf
    Base Intelligence
    Io's Base Intelligence decreases from 23 to 21.
    23→21
    Source line
    Base Intelligence decreased from 23 to 21
    Adjust
    Damage at level 1 unchanged (45–51).
    Source line
    Damage at level 1 unchanged (45–51)
    Buff
    Spirits · Mana Cost
    Mana Cost on Io's Spirits decreases from 100/110/120/130 to 90/100/110/120.
    100/110/120/130→90/100/110/120
    Source line
    Mana Cost decreased from 100/110/120/130 to 90/100/110/120
    Buff
    Spirits · Cooldown
    Cooldown on Io's Spirits decreases from 22/21/20/19s to 15s.
    22/21/20/19s→15s
    Source line
    Cooldown decreased from 22/21/20/19s to 15s
    Nerf
    Spirits · Duration
    Duration on Io's Spirits decreases from 19s to 15s.
    19s→15s
    Source line
    Duration decreased from 19s to 15s
    Adjust
    Talents
    Level 10 Talent +12 Attack Damage to Tethered Units replaced with +7 Strength.
    Source line
    Level 10 Talent +12 Attack Damage to Tethered Units replaced with +7 Strength
    Adjust
    Talents
    Level 15 Talent +60 Spirits Hero Damage replaced with +50% Spirits Damage.
    Source line
    Level 15 Talent +60 Spirits Hero Damage replaced with +50% Spirits Damage
    Adjust
    Talents
    Level 25 Talent Unslowable during Overcharge replaced with -1.5s Relocate Cast Delay.
    Source line
    Level 25 Talent Unslowable during Overcharge replaced with -1.5s Relocate Cast Delay

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.