Radiant
17 + 2.2
14 + 1.6
23 + 1.7
Movement Speed 280
Turn Rate 0.7
Day/Night Sight Range 1800/800
Attack Range 575
Missile Speed 1200
Attack Point 0.15
Base Attack Time 1.7
Level 1 16 25
Health 540 1240 1980
Mana 351 675 1071
Min Damage 39 74 111
Max Damage 48 83 120
Armor -0.04 3.6 8.08
Attacks / Second 0.67 0.82 1.01
Level Talents
10 +20% XP Gain+45 Damage
15 +75 Spirits Hero DamageTether Grants Scepter Bonus
20 +150 Gold/Min+15 Health Regen
25 -60s Relocate CooldownAttack Tethered Ally's Target
Bio

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 existence together. It is only in the controlled warping of these electrical waylines 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.
Tether
Ability: Target Unit
Tethers Io to an allied unit, granting bonus movement speed to both. When Io restores health or mana, tethered units target gains a larger portion of that amount. The tether breaks when the allied unit moves too far away, or Io cancels the tether.
COOLDOWN: 12 / 12 / 12 / 12
MANA COST: 40 / 40 / 40 / 40
MAX TETHER DISTANCE: 900 / 900 / 900 / 900
%MOVEMENT SPEED BONUS: 5 / 8 / 11 / 14
HP/MANA AMP: 1.2 / 1.3 / 1.4 / 1.5
Spirits
Ability: No Target Damage: Magical
Summon five particle spirits that dance in a circle around Io. If a particle collides with an enemy hero, it explodes, damaging and slowing 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.
COOLDOWN: 26 / 22 / 18 / 14
MANA COST: 120 / 130 / 140 / 150
CREEP DAMAGE: 10 / 18 / 26 / 34
HERO DAMAGE: 20 / 40 / 60 / 80
%MOVEMENT SLOW: 20 / 40 / 60 / 80
SLOW DURATION: 0.3
OSCILLATION RADIUS: 700
EXPLOSION RADIUS: 360
DURATION: 19 / 19 / 19 / 19
Overcharge
Ability: No Target, Toggle
Io gains bonus attack speed and damage reduction, at the cost of draining a percentage of its current health and mana per second. If Io is Tethered to an ally, that unit also gains the bonuses.
COOLDOWN: 2
ATTACK SPEED: 40 / 50 / 60 / 70
%INCOMING DAMAGE REDUCTION: -5 / -10 / -15 / -20
%HEALTH/MANA DRAIN: 6.0
Ability:
Ability:
Relocate
Ability: Target Point, Channeled
Teleports Io and any tethered ally to any location. After the spell expires Io and any tethered ally will return to their original location. Double-click to teleport to your team's base fountain.
COOLDOWN: 130 / 110 / 90
MANA COST: 100 / 100 / 100
CAST TIME: 2.7 / 2.35 / 2
RETURN TIME: 12 / 12 / 12
Break Tether
Ability: No Target
Break the link to the tethered unit.
COOLDOWN: 1 / 1 / 1 / 1
Spirits Movement
Ability: No Target
Calls the spirits in and out.
COOLDOWN: 1.5

Patch History

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
6.78 Overcharge hp/mp cost increased from 3.5% to 4.5%
6.75 Tether regeneration transfer now heals the Tethered unit at 1.5x the rate of Wisp (it was 1x)
6.75 Overcharge HP/MP cost over time increased from 2.5% to 3.5%
6.72 Base damage increased from 33-42 to 43-52
6.72 Attack range increased from 525 to 575
6.72 Tether stun duration rebalanced from 1/1.25/1.5/1.75 to 0.75/1.25/1.75/2.25
6.72 Spirits Oscillation subabilities no longer interrupt Wisp's movement
6.72 Spirits now circle slightly faster when there are fewer alive
6.72 Spirits life duration increased by 3 seconds
6.72 Spirits now spawn over 4 second interval instead of 6
6.72 Overcharge Reworked
6.72 Spirits no longer slow
6.72 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
6.71 Spirits cooldown rescaled from 14 to 20/18/16/14
6.69 Tether Stun duration reduced from 1.25/1.5/1.75/2.0 to 1/1.25/1.5/1.75
6.69 Relocate cooldown increased from 80/60/40 to 90/75/60
6.68 New hero