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Vision determines what each unit can see. Each unit has a radius that gives vision around itself, and anything beyond its vision and its allies are hidden by Fog of War. Units cannot see through trees or terrain that's in higher elevation. Clearvision allows units to ignore these limitations. Stealthed enemy units cannot be seen within vision radius unless they are Revealed. In most cases, any vision granted by allied heroes, creeps, and buildings are shared.

Fog of War[edit | edit source]

All areas outside of friendly Vision become Fog of War. Enemy units cannot be seen nor targeted as long as it's inside the Fog of War. Building locations can be seen inside the Fog of War, but any info on the building, such as Health, cannot be seen, nor can they be targeted.

Vision is shared between teams. Anything your allied heroes, creeps, buildings, Wards, and gadgets can be seen by you as well. There are abilities which unlink shared vision, which means your only source of vision comes from your hero or any other owned units (i.e. pets) for the duration. There are two abilities that can inflict unlinked vision: The Dark Lady.jpg The Dark Lady's The Dark Lady Cover of Darkness.jpg Cover of Darkness and Adrenaline.jpg Adrenaline's Adrenaline Death's Halo.jpg Death's Halo.

If vision of an enemy is lost during the startup animation of a single-target ability, the ability will cancelled. However, attacks will not be interrupted if vision of the enemy is lost. If an enemy unit inside Fog of War attacks, it briefly becomes Sighted.

Fog of War updates every 0.4 seconds.

Trees and Elevation[edit | edit source]

Trees block vision and units cannot see through them. In certain areas of the map, there are small gaps between trees that allow units to move through them. Utilizing this to escape an enemy is known as "juking." Trees can be destroyed to prevent them from blocking vision, although it works for both sides.

Units also cannot see areas that are in a higher elevation, while units on higher terrain can see whatever's on lower terrain. In addition, if a ranged unit attacks another unit at a higher elevation, it suffers a 25% Miss Chance, known as "uphill miss chance". Uphill miss chance can be negated with True Strike. Wards of Sight and Wards of Revelation do not benefit from uphill miss chance.

Time of Day[edit | edit source]

Many units have higher vision radius at daytime compared to nighttime. All heroes have a base vision radius of 1800 at day and 800 at night. While some non-hero units have the same vision radius regardless of time of day, currently no unit has a higher vision radius at night than at day.

Vision radius[edit | edit source]

Heroes[edit | edit source]

All heroes have a vision of 1800 at Day and 800 at Night. A few abilities can modify hero vision radius.

Vision Radius modifiers[edit | edit source]

Unit/Item Source Target Vision radius Duration Notes
Adrenaline.jpg Adrenaline Adrenaline Death's Halo.jpg Death's Halo Enemy Hero 400 2.5 seconds Unlinks shared vision
Flint Beastwood.jpg Flint Beastwood Flint Beastwood Dead Eye.jpg Dead Eye Passive +100/200/300/400 N/A
Moon Queen.jpg Moon Queen Moon Queen Lunar Glow.jpg Lunar Glow Passive +200/400/600/800 N/A Night only
The Dark Lady.jpg The Dark Lady The Dark Lady Cover of Darkness.jpg Cover of Darkness Enemy Heroes 500/450/400 4/5/6 seconds Unlinks shared vision

Clearvision[edit | edit source]

Clearvision grants vision within its radius, but its vision is not blocked by trees or higher terrain. Many abilities, ability projectiles, or status effect that gives sight of the target grant Clearvision. There are a few sources of permanent Clearvision as well. Clearvision radius can vary between time of day as well.

Passive[edit | edit source]

Some units possess passive Clearvision.

Source Radius
Flying Courier.jpg Flying Courier 400
Emerald Warden Summon Gawain.jpg Gawain 600
Bramble Rejuvenating Growth.jpg Rejuvenating Growth 500
Shiver.jpg Shiver 800/1000/1200/1400
Zorgath.jpg Zorgath 1400

Buffs[edit | edit source]

These abilities grant Clearvision around the user.

Unit/Item Source Radius Duration Notes
Artesia.jpg Artesia Artesia Dance of Death.jpg Dance of Death 1000 4.5/6/7.5/9 seconds (Channeling)
Corrupted Disciple.jpg Corrupted Disciple Corrupted Disciple Electric Tide.jpg Electric Tide 700 4 seconds
Fayde.jpg Fayde Fayde Reflection.jpg Reflection 800/1000/1200 20/40/60 seconds (Stealth)
Prophet.jpg Prophet Prophet Raven Form.jpg Raven Form 2000/2100/2200 30/45/60 seconds Attacking or casting spells will lower the duration to 12 seconds if there are more than 12 seconds left on the state
Slither.jpg Slither Slither Poison Burst.jpg Poison Burst 800 3 seconds
Token of Vision.jpg Token of Vision Passive 900 Until death

Sighted[edit | edit source]

Applies a status effect that grants vision of and around the target(s). Vision is lost once the target is killed.

Unit/Item Source Radius Duration Notes
Arachna.jpg Arachna Arachna Spider Sting.jpg Spider Sting 200 5 Spiderling's attacks or 15 seconds Grants vision while the Spiderling is alive
Berzerker.jpg Berzerker Berzerker Mark for Death.jpg Mark for Death 350 8 seconds Grants vision while mark is active
Blitz.jpg Blitz Blitz Pilfering.jpg Pilfer 800 Up to 5 seconds Applies while linked to target
Bushwack.jpg Bushwack Bushwack Jungle Toxin.jpg Jungle Toxin 500 3 seconds
Corrupted Disciple.jpg Corrupted Disciple Corrupted Disciple Corrupted Conduit.jpg Corrupted Conduit 800 Up to 10 seconds Applies while linked to target
Cthulhuphant.jpg Cthulhuphant Cthulhuphant Dream of Madness.jpg Dreams of Madness 200 1/1.5/2/2.5 seconds Applies while target is driven mad
Emerald Warden.jpg Emerald Warden Emerald Warden Hunter's Command.jpg Hunter's Command 500 5 seconds
Geomancer.jpg Geomancer Geomancer Earth's Grasp.jpg Earth's Grasp 4 seconds
Gunblade.jpg Gunblade Gunblade Grappling Shot.jpg Grappling Shot 600 Up to 4 seconds Grants vision while grappled
Klanx.jpg Klanx Klanx H.A.W.K..jpg H.A.W.K. 0 2 seconds Grants vision to enemies when autoattacking with H.A.W.K. active
Moira.jpg Moira Moira Ephemeral Forge.jpg Ephemeral Forge 200 2 seconds Grants visions to enemies within 1000 units of the Spirit Mimic during initial channel time
Pestilence.jpg Pestilence Pestilence Swarm.jpg Swarm 350 30 seconds
Prisoner 945.jpg Prisoner 945 Prisoner 945 Shackled.jpg Shackled 200 Up to 3.5/4/4.5/5 seconds Grants vision while ball n' chain is attached
Puppet Master.jpg Puppet Master Puppet Master Puppet Show.jpg Puppet Show 200 2.5/3/3.5/4 seconds
Rampage.jpg Rampage Rampage The Chains That Bind.jpg The Chains That Bind 600 2.5/3/3.5 seconds

Projectile[edit | edit source]

These projectiles or gadgets grant Clearvision while it is on the map. Some projectiles give vision for a short time after it expires.

Unit/Item Source Radius Duration Notes
Aluna.jpg Aluna Aluna Power Throw.jpg Power Throw 800 N/A
Amun-Ra.jpg Amun-Ra Amun-Ra Path of Destruction.jpg Path of Destruction 800 N/A Grants vision around the meteor's landing point
Andromeda.jpg Andromeda Andromeda Aurora.jpg Aurora 500 5 seconds
Artesia.jpg Artesia Artesia Arcane Missile.jpg Arcane Missile 280 3 seconds Vision lingers after impact
Bombardier.jpg Bombardier Bombardier Air Strike.jpg Air Strike! 350 5 seconds SotM version only; Grants vision around napalm
Bubbles.jpg Bubbles Bubbles Shell Surf.jpg Shell Surf 800 3.34 seconds
Calamity.jpg Calamity Calamity Sunder's Vault.jpg Sunder's Vault 550 4.5 seconds
Chronos.jpg Chronos Chronos Chronofield.jpg Chronofield 500 3/4/5 (5/6/7) seconds
CirceHero.jpg Circe Circe Entrapment.jpg Entrapment 400/800 1.5 seconds
Doctor Repulsor.jpg Doctor Repulsor Doctor Repulsor Magnetic Contraption.jpg Magnetic Contraption 400 Up to 16 seconds Lasts until Contraption is detonated
Doctor Repulsor.jpg Doctor Repulsor Doctor Repulsor Opposite Charges.jpg Opposite Charges 300 3 seconds Grants vision around magnet
Ellonia.jpg Ellonia Ellonia Glacial Spike.jpg Glacial Spike 200/500 2 seconds Grants lingering vision around impacted targets
Ellonia.jpg Ellonia Ellonia Frigid Field.jpg Frigid Field 300 4 seconds
Ellonia.jpg Ellonia Ellonia Absolute Zero.jpg Absolute Zero 1000 0 (6) seconds
Empath.jpg Empath Empath Illusory Veil.jpg Illusory Veil 650x200 (Vector) 3/4/5/6 seconds
Fayde.jpg Fayde Fayde Burning Shadows.jpg Burning Shadows 200 N/A
Fayde.jpg Fayde Fayde Shadow Walk.jpg Deep Shadows 600 5 seconds
Flint Beastwood.jpg Flint Beastwood Flint Beastwood Explosive Flare.jpg Explosive Flare 800 4 seconds
Flux.jpg Flux Flux Discharge Pull.jpg Discharge 1000/700 3 seconds Grants vision around enemy heroes' locations
Frostfield Plate.jpg Frostfield Plate Activation 800 2 seconds
Gauntlet.jpg Gauntlet Gauntlet Grapple.jpg Grapple 600 N/A
Gauntlet.jpg Gauntlet Gauntlet Gauntlet Blast.jpg Gauntlet Blast 600 N/A
Geomancer.jpg Geomancer Geomancer Quicksand.jpg Quicksand 600 6 seconds
Kraken.jpg Kraken Kraken Tsunami Charge.jpg Tsunami Charge 500 5 seconds Grants vision around where charge stopped
Kraken.jpg Kraken Kraken Release the Kraken.jpg Release the Kraken! 200 3/4/5 seconds
Maliken.jpg Maliken Maliken Sword Throw.jpg Sword Throw 700 N/A
Moira.jpg Moira Moira Arcane Vortex.jpg Arcane Vortex 350 4 seconds
Monarch.jpg Monarch Monarch Noxious Nightcrawler.jpg Noxious Cloud 400 4 seconds
Monarch.jpg Monarch Monarch Cleansing Wind.jpg Cleansing Wind 800 1 (4) seconds
Moraxus.jpg Moraxus Moraxus More Axes.jpg More Axes 100 N/A
Myrmidon.jpg Myrmidon Myrmidon Magic Carp.jpg Magic Carp 800 3.34 seconds Vision lingers on impact
Pearl.jpg Pearl Pearl Whirlbubble.jpg Whirlbubble 500 1.3 seconds Grants vision around end point
Pearl.jpg Pearl Pearl Preservation.jpg Preservation 600 8/10/12 seconds
Pharaoh.jpg Pharaoh Pharaoh Tormented Soul.jpg Tormented Soul 500 10 seconds
Ravenor.jpg Ravenor Ravenor Ball Lightning.jpg Ball Lightning 500 N/A
Rhapsody.jpg Rhapsody Rhapsody Disco Inferno.jpg Disco Inferno 400 6.5 seconds
Riftwalker.jpg Riftwalker Riftwalker Cascade Event.jpg Cascade Event 400 2 seconds Grants vision after delay
Riptide.jpg Riptide Riptide Undertow.jpg Undertow 350 N/A Grants vision inside puddles
Sacrificial Stone.jpg Sacrificial Stone Passive 700/50 5 seconds Clearvision is reduced to 50 until respawn
Sand Wraith.jpg Sand Wraith Sand Wraith Desert's Curse.jpg Desert's Curse 500 12 seconds
Shadowblade.jpg Shadowblade Shadowblade Soul's Sight.jpg Soul's Sight 800 6 seconds
Silhouette.jpg Silhouette Silhouette Tree Grapple.jpg Tree Grapple 400 Up to 6 seconds Grants vision around hooked tree
Solstice.jpg Solstice Solstice Illuminate.jpg Shining Rays 700 8 seconds
Solstice.jpg Solstice Solstice Luminescence.jpg Luminescence 700 0.5 seconds
Succubus.jpg Succubus Succubus Cursed Embrace.jpg Cursed Embrace 300 5.1 seconds (Channeling)
Tarot.jpg Tarot Tarot Far Scry.jpg Far Scry 200 8/10/12/14 seconds
Tempest.jpg Tempest Tempest Elemental Void.jpg Elemental Void 400 4 seconds
The Chipper.jpg The Chipper The Chipper Rocket Barrage.jpg Rocket Barrage 400/800 1.5 seconds Vision lingers after impact
The Chipper.jpg The Chipper The Chipper Sawblade Showdown.jpg Sawblade Showdown 800x200 (Vector) 8 seconds
The Gladiator.jpg The Gladiator The Gladiator Pitfall.jpg Pitfall 400 4 seconds Grants vision after delay
The Gladiator.jpg The Gladiator The Gladiator Call to Arms.jpg Call to Arms 800 3.34 seconds
Thunderbringer.jpg Thunderbringer Thunderbringer Blast of Lightning.jpg Blast of Lightning 1000/700 3 seconds Grants vision around target's location
Thunderbringer.jpg Thunderbringer Thunderbringer Lightning Storm.jpg Lightning Storm 1000/700 3 seconds Grants vision around targets' locations
Tundra.jpg Tundra Tundra Piercing Shards.jpg Piercing Shards 500 N/A
Valkyrie.jpg Valkyrie Valkyrie Javelin of Light.jpg Javelin of Light 800 3.34 seconds
Werebeast Enchanter.jpg Werebeast Enchanter Werebeast Enchanter Far Sight.jpg Far Sight 700 8 seconds
Zephyr.jpg Zephyr Zephyr Typhoon.jpg Typhoon 600 8/10/12 seconds