universal

Io

Links to its allies to buff them

Ranged

Amplify your hard carry's potential with Io, an ultimate save support specializing in making allies more effective. Tethering to a core speeds allies and stops enemies, allowing Io to sustain them infinitely and easily orchestrate global ganks by teleporting both heroes anywhere on the map.

Io abilities, talents and win rates on this page are from Dota 2 patch 7.41e.

3/3
Complexity
3/3
Support
2/3
Escape
1/3
Nuker

Io Performance Summary

On patch 7.41e, Io holds a 50.81% win rate across 169,344 ranked games. That average hides a 2.4-point swing between skill brackets — 51.43% in Ancient against 49.05% in Herald — so Io rewards knowing the hero far more than the raw number suggests.

Base Stats

Io
Health538+0.3 / s
Mana327
AttributeBase / Growth per lvl
strengthStrength
19+3 per lvl
agilityAgility
14+1.6 per lvl
intelligenceIntelligence
21+1.7 per lvl
StatValue
DamageDamage
58 – 64
ArmorArmor
3.3
Movement SpeedMovement Speed
320
Attack RangeAttack Range
500

Win Rates by Rank

Patch7.41e
Public Win Rate51%169.3K matches
Pro Win Rate25%1W / 3L
Pro Bans1275% of contests
RankPicksWin Rate
HeraldHerald
7.3K
49%
GuardianGuardian
22.2K
50%
CrusaderCrusader
33.2K
51%
ArchonArchon
37.1K
51%
LegendLegend
30.5K
51%
AncientAncient
20.2K
51%
DivineDivine
18.8K
51%

Faces of Io

Data Timeframe: Past 6 months

Innate Ability

Equilibrium
Hidden, Passive

Io gains outgoing damage amplification the closer it is to full health, and Health Restoration and Healing Amplification the closer it is to zero health.

Max Damage Amp4%
Max Heal Amp4%
Current Damage Amp0%
Current Heal Amp0%

Talent Tree

Attack Tethered Ally's Target (50% damage)
25
-2s Relocate Cast Delay
-30s Relocate Cooldown
20
+0.2% Overcharge Max HP Regen Bonus
+50% Spirits Damage
15
+5% Tether Movement Speed
+8 Strength
10
+1.5s Overcharge Duration

Abilities

Tether
Pierces BKB
Unit Target

Tethers Io to an allied unit, granting bonus movement speed to both. When Io restores health or mana, the tethered unit gains a portion of that amount. The tether breaks when the allied unit moves too far away, or Io cancels the tether. Tether slows enemies touching it.

Max Tether Distance1000
Movement Speed Bonus6% / 8% / 10% / 12%
Latch Distance700
Latch Speed1000
Hp/Mana Transfer55% / 75% / 95% / 115%
Tether Mana Amp55 / 75 / 95 / 115
Enemy Move/Attack Slow15% / 30% / 45% / 60%
Slow Duration0.2s
Tick Rate0.5
Cast Range1600
Mana40
Cooldown12s
Spirits
Magical
No Target, Instant Cast

Summon five particle spirits that dance in a circle around Io. If a particle collides with an enemy hero, it explodes, damaging all enemy units in an area around it. Creeps take minor damage from touching a particle spirit, but do not cause them to explode. When its duration ends, any remaining Spirits explode.

Creep Damage12 / 18 / 24 / 30
Hero Damage30 / 50 / 70 / 90
Revolution Time5s
Min Range200
Default Radius425
Oscillation Radius650
Hero Hit Radius110
Explosion Radius360
Hit Radius150
Spirit Movement Rate250
Duration15s
Spirit Amount5
Movement Slow0%
Spirit Spawn Time1s
Duration15s
Mana90 / 100 / 110 / 120
Cooldown15s
Overcharge
No Target, Instant Cast

Io gains attack speed, spell amplification, and health regeneration based on max health. If Io is Tethered to an ally, that unit also gains any bonuses granted by Overcharge.

Bonus Attack Speed35 / 60 / 85 / 110
Bonus Spell Amp8% / 10% / 12% / 14%
Max Health Regen0.5% / 0.6% / 0.7% / 0.8%
Duration8s
Mana40 / 60 / 80 / 100
Cooldown25 / 22 / 19 / 16s
Spirits In
Hidden, Instant Cast

Sends the spirits closer to you. Can be toggled on and off.

Spirits Out
Hidden, Instant Cast

Sends the spirits farther away from you. Can be toggled on and off.

Relocate
Point Target

Teleports Io and a tethered ally to any location. After the spell expires, Io and the tethered ally will return to their original location. Double-click to teleport to your team's base fountain.

Cast Time3.5 / 3.25 / 3s
Return Time12s
Mana175
Cooldown90 / 80 / 70s

Aghanim's Upgrades

Aghanim's ScepterUpgrades Spirits

Spirits now passively spawn around Io constantly every second up to the max. Spirits colliding with enemy Heroes slows them briefly. Can be activated to explode spirits.

Aghanim's ShardUpgrades Tether

Tether damages enemies touching it. Io is healed for 50% of the damage done.