Io

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• Equipment
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[e][h]Io

Radiant Hero

Attributes

17 +3

14 +1.6

23 +1.7

22 - 31

1

280

Base Stats

Base HP Regen

0

Base Mana Regen

0

Sight Range

1800 / 800

Attack Range

500

Missile Speed

1200

Attack Duration

0.15 + 0.4

Cast Duration

0.001 + 0

Base Attack Speed

100

Base Attack Time

1.7

Base Magic Resist

25%

Turn Rate

0.7

Level Changes

Level

1

15

25

Health

582

1527

2202

Mana

351

627

831

Armor

3.2

6.8

9.4

Damage

39-48

81-90

111-120

Spell Amp

1.6%

3.3%

4.5%

Magic Resist

26%

29%

31%

Movement Speed Amp

0.7%

1.8%

2.6%

Most Played As

LessMore

Role

1

2

3

4

5

Notes

Io does not need to turn to perform actions. Io can attack, move, cast abilities, and cast items without waiting for the turn to occur first. This is a unique and innate trait of Io. Io still retains a turn rate and a front/back for the purposes of directional input, and still attempts to turn after an action is performed.

Io, the Wisp

Recommended Roles

Support Escape Nuker

Io is everywhere, and in all things. Denounced by enemies as the great unmaker, worshiped by scholars as the twinkling of a divine eye, this strange Wisp of life-force occupies all planes at once, the merest fraction of its being crossing into physical existence at any one moment.

Like the great twin riders Dark and Light, and yet another ancient traveler whose true history is lost to the ages, Io the Wisp is a Fundamental of the universe—a force older than time, a wanderer from realms far beyond mortal understanding. Io is nothing less than the sum of all attractive and repulsive forces within the material field, a sentient manifestation of the charge that bind particles together. It is only in the controlled warping of these forces that Io's presence can be experienced on the physical plane. A benevolent, cooperative force, Io bonds its strange magnetism to others so that the power of allies might be enhanced. Its motives inscrutable, its strength unimaginable, Io moves through the physical plane, the perfect expression of the mysteries of the universe.

Abilities

Tether

QT

Targeting
Unit Target

Affects
Allied Units

Io tethers to an allied unit, granting both Io and the tethered ally bonus movement speed. While tethered, Io's health and mana regeneration is also restored to the ally. Enemy units that cross the tether are slowed.

---

Io may cancel tether at any time with  Break Tether.

Ally Regeneration	60% / 90% / 120% / 150%

Movement Speed Bonus	5% / 8% / 11% / 14%

Movement Speed Slow	8% / 16% / 24% / 32%

Slow Duration	0.2

Tether Break Distance	900

Cast Range	1800

Cast Point	0

Ability	Attack Tethered Ally's Target 25

12

40

	Does not pierce Spell Immunity.

The benevolent touch of Io brings strength from between the planes.

Notes

• Ally regeneration is based on Io's current regeneration.
• Io's movement speed is set to match the tethered ally's movement speed.
• Enemy units may only be slowed once per cast of tether.
• If Io and the target ally are further than 700 range when tether is used, Io will slingshot rapidly at 1000 speed towards the ally to a distance of 300 range. When this slingshot occurs, trees at the destination around Io within 350 range will be destroyed.
• If Io is more than 700 range away while tethered, the tether visual gets thinner to indicate it is near breaking distance.
• If interrupted, the tether is canceled and Io stops traveling.
• Attacking the tethered ally's target is passive and does not interrupt Io.
  25

Break Tether

QT

Targeting
No Target

Breaks the link to the tethered unit.

Cast Point	0

0.25

Spirits

WW

Targeting
No Target

Affects
Enemy Units

Damage Type
Magical

Summons five spirits that dance in a circle around Io, damaging enemies they hit. If a spirit hits an enemy hero it explodes, damaging all enemy units in an area around it. Creeps take minor damage from touching a spirit and do not cause them to explode.

Creep Damage	10 / 18 / 26 / 34

Hero Damage	20 / 40 / 60 / 80 155 20

Collision Radius	110

Explosion Radius	360

Spirits Duration	19

Cast Point	0

26 / 24 / 22 / 20

120 / 130 / 140 / 150

	Spirits passively spawn around Io every second.
	Does not pierce Spell Immunity.

Io twists the particles of the universe with his unimaginable capabilities.

Notes

• Spirits spawn one by one over 4 seconds and will initially spawn 150 units away.
• Spirits provide 150 flying vision briefly when colliding with an enemy hero.
• If the spell duration runs out or is recast, any spirits still circling Io will explode at their present location.
• The spirits complete a revolution every 2.7 seconds regardless of distance from Io, meaning spirits will move more quickly when further away.

Spirits Movement

WW

Targeting
Toggle

Calls the spirits in and out.

Maximum Distance	700

Minimum Distance	200

Cast Point	0

Overcharge

EV

Targeting
Toggle

Affects
Self

Io gains bonus attack speed and damage resistance.

---

If Io is connected to an ally with  Tether, they also gain the bonuses.

Bonus Attack Speed	50 / 80 / 110 / 140

Max HP Regen	0.5% / 0.6% / 0.7% / 0.8%

Duration	8

Cast Point	0

22 / 20 / 18 / 16

40 / 60 / 80 / 100

Drawing on the energy of matter from all worlds, Io begins the unraveling of time.

Relocate

RR

Targeting
Point Target

Affects
Self

Teleports Io and an ally connected by  Tether to any location on the map. After the spell expires, Io along with any tethered ally will return to the location where Relocate was cast from.

Delay	3.5 / 3.25 / 3

Duration	12

Cast Range	Global

Cast Point	0

90 / 75 / 60
     30

25

175

Io is the embodiment of the mystery of the universe.

Notes

• Double clicking Relocate teleports to the fountain.
• Destroys trees within 300 range of the teleport destination and return location.
• The visual effect on Io, visual effect at the destination, and minimap marker of the destination are also visible to enemies.

Talent Tree

Talent Tree
Attack  Tether Ally's Target	25	-30s  Relocate Cooldown
+15 Armor	20	+75  Spirits Hero Damage
+13% Spell Lifesteal	15	+400 Spirits Max Distance
+45 Damage	10	+5 Health Regen

Recommended Items

Starting Items			Early Game

Mid Game			Late Game

General Strategy

Io has a talent for making allies more effective. A powerful companion, the wisp's tether speeds allies and stops enemies. Capable of linking to and teleporting across the battlefield with an ally, Io can make a dangerous ally even deadlier.

Io (In-Game Description)

Overview

Skill Build

Level	1	2	3	4	5	6	7	8	9	10
Spell
Level	11	12	13	14	15	16	18	20	25
Spell

Early Game

Mid Game

Late Game

Version History

Version	Balance Changes
7.24b
	Overcharge regen from 0.55/0.7/0.85/1% to 0.5/0.6/0.7/0.8%
7.24
	Overcharge heal reduced from 0.6/0.8/1/1.2% to 0.55/0.7/0.85/1% Overcharge cooldown increased from 16 to 22/20/18/16 Level 15 Talent changed from +120 Gold/Min to +400 Spirits Max Distance
7.23
	Base armor increased from -1 to 1 Tether now slows enemies by 8/16/24/32% Overcharge: Cooldown reduced from 18 to 16 Now provides 0.6/0.8/1/1.2% Max HP Regen per second instead of damage reduction Still provides attack speed Note: regeneration is applied on both targets with Tether, and thus the Tether target regenerates more Level 10 Talent changed from +90 Gold/Min to +5 Health Regen Level 15 Talent changed from +8 Health Regen to +13% Spell Lifesteal Level 15 Talent changed from Spirits Apply Slow to +120 Gold/Min
7.22g
	Level 10 Talent changed from Spirits Apply Slow to +90 Gold/Min Level 15 Talent changed from +75 Spirits Hero Damage to Spirits Apply Slow Level 20 Talent changed from +150 Gold/Min to +75 Spirits Hero Damage
7.22e
	Tether heal/restore transfer reduced from 90/110/130/150% to 60/90/120/150%
7.22d
	Level 20 Talent changed from Tether Grants Scepter Bonus to +15 Armor
7.22c
	Attack range reduced from 575 to 500 Base armor increased from -2 to -1 Strength gain increased from 2.5 to 3 Tether regen reduced from 105/120/135/150% to 90/110/130/150% Tether cancel now has a 0.25s cooldown to prevent accidental uses Spirits no longer slow Level 10 Talent changed from +20% XP Gain to Spirits Apply Slow
7.22
	Added to Captains Mode Added Scepter upgrade: Spirits now passively spawn around you constantly every second (Still max of 5 spirits at a given time) Tether pull can now be interrupted if stunned during it (Like  Timber Chain)
7.21b
	Tether no longer makes you unslowable Spirits no longer has a toggle cooldown Spirits min range increased from 100 to 200 Spirits rotation interval from every 2.4 seconds to 2.7 Spirits no longer does a micro animation interruption when initially casting (Already has zero cast point) Relocate mana cost increased from 100 to 175 Level 15 Talent changed from Tether Grants Scepter Bonus to +8 Health Regen Level 20 Talent changed from +16 Health Regen to Tether Grants Scepter Bonus
7.21
	Temporarily removed from Captains Mode Tether now transfers health and mana even when Io is at max hp/mp Overcharge now has an 18 second cooldown and an 8 second duration No longer has a 2 second toggle Overcharge now costs 40/60/80/100 mana to cast No longer cost 6% of health and mana per second Overcharge attack speed bonus increased from 40/50/60/70 to 50/80/110/140 Overcharge damage reduction increased from 5/10/15/20% to 15/20/25/30% Relocate delay increased from 2.7/2.35/2 to 3.5/3.25/3 Relocate cooldown reduced from 130/110/90 to 90/75/60 Relocate is now cast delay again instead of channeling (Being interrupted, silenced, rooted, etc. will cancel the ability) Level 25 Talent changed from -60s Relocate Cooldown to -30s
7.20d
	Tether heal/mp transfer rate reduced from 1.2/1.3/1.4/1.5 to 1.05/1.2/1.35/1.5
7.20
	Spirits cooldown increased from 26/22/18/14 to 26/24/22/20
7.19b
	Spirits cooldown increased from 20/18/16/14 to 26/22/18/14 Level 10 Talent reduced from +25% XP to +20%
7.18
	Relocate now has a channel time instead of a cast delay
7.17
	Spirits damage reduced from 25/50/75/100 to 20/40/60/80 Tether movement speed reduced from 7/10/13/16 to 5/8/11/14% Level 10 Talent reduced from +60 Damage to +45 Level 20 Talent reduced from +20 Health Regen to +15
7.16
	Base movement speed reduced from 290 to 280 Level 15 Talent reduced from +90 Spirits Damage to +75 Level 20 Talent changed from Attacks Tether Ally's Target to +20 Health Regen Level 25 Talent changed from +50 Health Regen to Attacks Tether Ally's Target
7.14
	Tether can now target Spell Immune allies Tether cast point changed from 0.001 to 0 Tether no longer applies slow on impact Spirits now apply a 20/40/60/80% movement speed slow on impact for 0.3 seconds Spirits now have two fixed positions they go to, 700 and 100 Spirits In/Out is just one ability now, alternating the direction No longer granular with toggles, but just a single press action Has a 1.5 second cooldown, same hotkey as spirits ability Base cooldown/duration is still the same Spirits creep damage increased from 8/14/20/26 to 10/18/26/34 Spirits mana cost from 150 to 120/130/140/150 Spirits collision AoE increased from 70 to 110 Spirits explosion damage AoE increased from 300 to 360 Level 10 Talent changed from +400 Spirits Max Range to +25% XP Level 25 Talent changed from Tether Stuns to -60s Relocate Cooldown
7.13b
	Base movement speed reduced from 295 to 290
7.12
	Tether now sets your movement speed to match the tethered target's speed Tether no longer has a duration Tether movement speed rescaled from 10/12/14/16% to 7/10/13/16% Tether regen sharing rescaled from 1.5× to 1.2/1.3/1.4/1.5× Relocate cooldown increased from 120/100/80 to 130/110/90 Base damage reduced from 26-35 to 22-31
7.10
	Tether duration increased from 12 to 14
7.07
	Relocate cooldown increased from 100/80/60 to 120/100/80 Max Spirits range reduced from 875 to 700 Reworked Talent Tree
7.06e
	Spirits mana cost increased from 120/130/140/150 to 150
7.06d
	Tether movement speed reduced from 13/14/15/16% to 10/12/14/16%
7.06c
	Overcharge Health/Mana drain from 4.5% to 6%
7.06
	Replaced Respawn Talent: Tether Stuns (Level 25)
7.03
	Relocate cooldown rescaled from 90/75/60 to 100/80/60
7.02
	Level 25 Talent from -40s Respawn Time to -50s
7.00
	Added Talent Tree
6.88e
	Relocate delay increased from 2.5/2.25/2 to 2.7/2.35/2
6.88
	Tether movement speed bonus reduced from 14/15/16/17% to 13/14/15/16%
6.84c
	Tether movespeed bonus reduced from 17% to 14/15/16/17%
6.84
	Relocate double click now teleports to fountain
6.83
	No longer requires turning to perform any actions
6.79
	Tether now does a 100% MS/AS slow instead of a stun
6.78c
	Tether movement bonus decreased from 20% to 17%
6.78
	Spirits no longer provide vision (Except temporarily when they collide with an enemy hero) Overcharge hp/mp cost increased from 3.5% to 4.5%
6.75
	Overcharge HP/MP cost over time increased from 2.5% to 3.5% Tether regeneration transfer now heals the Tethered unit at 1.5× the rate of Wisp
6.74
	Added to Captains Mode
6.72
	Base damage increased from 33-42 to 43-52 Attack range increased from 525 to 575 Tether stun duration rebalanced from 1/1.25/1.5/1.75 to 0.75/1.25/1.75/2.25 Spirits Oscillation subabilities no longer interrupt Wisp's movement Spirits now circle slightly faster when there are fewer alive Spirits life duration increased by 3 seconds Spirits now spawn over 4 second interval instead of 6 Overcharge Reworked Spirits no longer slow Tether movement speed bonus reduced from 15/20/25/30% to 20%
6.71
	Tether movement speed bonus reduced from 20/25/30/35 to 15/20/25/30 Spirits cooldown rescaled from 14 to 20/18/16/14
6.69
	Tether Stun duration reduced from 1.25/1.5/1.75/2 to 1/1.25/1.5/1.75 Relocate cooldown increased from 80/60/40 to 90/75/60
6.68
	New Hero

Notable Players

KuroKy

GH

fy

y`

Cr1t-

See also

• Slow
• Heal
• Damage Resistance

External links

Guides

• Standard Io (Lane) Build
• DotaFire's Builds & Guides for Io