Io (Dota 2) - Io Skills

This page details each of Io/Wisp's abilities/skills.

First Ability

Tether [Keybind: Q]

Ability	Affects
Target Unit	Allies

Tether yourself to an allied unit, granting both of you bonus movement speed. When you restore health or mana, your target gains 1.5x the amount. Any enemy unit that crosses the tether is slowed. The tether breaks when the allied unit moves too far away, or Io cancels the tether.

Range: 1800
Maximum Radius: 900
Tether Duration: 12
Slow Amount: 100% Movement speed/100 Attack speed
Slow Duration: 0.75/1.25/1.75/2.25
Bonus Movement Speed: 17%
Cooldown: 12 seconds
Mana Cost: 40

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

Cannot tether to a spell immune ally, but tether does not break if the tethered ally becomes spell immune.
If Io tries to tether a unit that is 700 units or further away, Io will latch on and pull itself closer to the target (to a distance of 300).
The tethered unit will benefit from Overcharge, Relocate, and from Io regenerating health/mana.
The health and mana regeneration will only be applied on the tethered unit if Io's respective pool isn't full.
The regeneration of any instant healing effect like Mekansm's one will be applied to the tethered unit depending on how much health was replenished on Io.
The regeneration of any instant mana regeneration effect like the Arcane Boots's will be applied fully to the tethered unit if 1 or more mana was replenished on Io's mana pool.
Has a sub-ability that lets you break the tether.
A unit may only be slowed once per cast of tether.
If Io is tethered to an invisible unit, the link is not visible to enemies.

Tether Break [Keybind: Q]

Ability
No Target

Break the link to the tethered unit. This replaces Tether while you are connected with an ally.

Second Ability

Spirits [Keybind: W]

Ability	Damage
No Target	Magical

Summon five spirits that dance in a circle around Io, damaging all that they hit around you. 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, but don't cause them to explode.

Radius of explosion: 300
Duration: 19
Damage to Heroes: 25/50/75/100
Damage to non-Heroes: 8/14/20/26
Cooldown: 20/18/16/14
Mana Cost: 120/130/140/150

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

Is blocked by Spell Immunity.
Upon use, Io gains 2 sub-abilities to control how far away the spirits orbit.
Deals 125/250/375/500 damage.
Spirits are summoned over the course of four seconds.
The spirits complete a revolution every ~2.3 seconds regardless of distance from Io. (Their angular velocity is constant, meaning that spirits move more quickly when further from Io.)
All unspent spirits will simultaneously detonate at the end of the duration or if recast, dealing full damage to nearby creeps and heroes.
Spirits briefly provide vision over heroes they collide with.
Unlike most other spells, the spirits are visible to the enemy even if Io is invisible.

Spirits In [Keybind: D]

Ability
Toggle

Calls the spirits closer to yo

Spirits Out [Keybind: F]

Ability
Toggle

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

Third Ability

Overcharge [Keybind: E]

Ability	Affects
Toggle	Self

Io gains bonus attack speed and damage reduction, at the cost of draining HP and mana per second. If Io is Tethered to an ally, that unit also gains the bonuses.

Bonus Attack Speed: 40/50/60/70
Incoming Damage Reduction: 5%/10%/15%/20%
HP/Mana Drain: 4.5% of current HP/Mana

Lore: Drawing on the energy of matter from all worlds, Io begins the unravelling of time.

Io cannot deny itself with this ability.
Cannot be purged.
Io and the tethered ally's effective health will be increased by 5.26%/11.11%/17.65%/25% (although this will quickly diminish for Io because of the health loss).

Ultimate Ability

Relocate [Keybind: R]

Ability
Target Point

Teleport yourself and any tethered ally to any location on the map. After the spell expires you and any tethered ally will return to where you teleported from.

Range: Global
Delay before teleport: 2.5/2.25/2
Duration: 12
Cooldown: 90/75/60
Mana Cost: 100

Lore: Io is the embodiment of the mystery of the universe.

There is a casting delay and the enemy has a visual indicator on the minimap at the target location before the teleport occurs.
If Io is interrupted during the casting delay, Relocate will be cancelled.
Relocate interrupts channeling and casting time abilities both on initial teleport, and when going back.
If Io is Tethered to a unit, the Tether's duration will be refreshed upon finishing casting Relocate.
Io may sever its Tether at any time to prevent bringing an ally back.

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Last updated by Machina, 25th September

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Alternative name(s)	Wisp
Full name	Io, the Guardian Wisp

Io (Dota 2)