Dota 6.81 Changelogs was first announced for Dota 2 and we assume that the same changes will be applied to DotA.
GENERAL
Roshan base armor increased by 1
Attack Speed now always continually adjusts based on the latest modifications applied to the unit [?]
Melee illusions created by a Rune of Illusion take 200% instead of 300% damage
Random Draft hero selection pool increased from 22 to 24
Captain's Draft hero selection pool increased from 24 to 27 (8 per type to 9)
Captain's Draft hero bans increased from 4 to 6
Meepo is no longer available in Ability Draft
HEROES
Abaddon
Aghanim's Scepter Borrowed Time now redirects 35% of all damage dealt to nearby allied heroes to Abaddon when active [?]
Ancient Apparition
Chilling Touch attack speed reduction increased from -15 to -20
Anti-Mage
Mana Void's area of effect increased from 450 to 500
Axe
Counter Helix now uses Pseudo Random chance [?]
Batrider
Flaming Lasso mana cost increased from 150 to 225
Beastmaster
Base damage increased by 4
Bloodseeker
Bloodrage cast point improved from 0.6 to 0.4
Bloodrage can no longer be dispelled [?]
Bounty Hunter
Track cast range increased from 900/1050/1200 to 1200
Brewmaster
If you have not attacked for 10 seconds, your next attack will always activate a Drunken Brawler critical hit
If you have not been attacked for 10 seconds, Drunken Brawler will cause you to evade the next attack[?]
Bristleback
Warpath no longer has unique values for the first movement speed stack[?]
Warpath movement speed stack bonus increased from 1/2/3% to 3/4/5% [?]
Broodmother
Spiderling's Poison Sting damage per second increased from 4 to 8
Spin Web's free pathing no longer deactivates when enemy has vision on Broodmother
Spin Web's free pathing is now disabled for 3 seconds when Broodmother takes damage [?]
Insatiable Hunger lifesteal increased from 40/60/80% to 60/80/100%
Centaur Warrunner
Hoof Stomp mana cost increased from 85/100/115/130 to 130
Chaos Knight
Phantasm now has a 50% chance to create one extra illusion when cast
Chen
Penitence cooldown reduced from 14 to 14/13/12/11
Clinkz
Death Pact cooldown reduced from 45 to 45/40/35
Dazzle
Poison Touch no longer causes a ministun[?]
Disruptor
Kinetic Field cooldown reduced from 14 to 14/13/12/11
Doom
Doom damage no longer ignores magic shields [?]
Drow Ranger
Gust knockback duration increased from 0.2 to 0.5
Earth Spirit
Stone Remnant recharge time reduced from 35 to 30
Earthshaker
Creeps no longer try to path around Fissure; they will wait for it to disappear
Echo Slam no longer ignores units that are invisible or in Fog of War
Elder Titan
Echo Stomp mana cost reduced from 100/115/130/145 to 100
Echo Stomp physical and magical damage increased from 80 to 80/85/90/95 each
Ember Spirit
Searing Chains duration reduced from 2/2/3/3 to 1/2/2/3 [?]
Sleight of Fist bonus damage reduced from 30/60/90/120 to 20/40/60/80
Enchantress
Untouchable slow duration increased from 3 to 4
Enigma
Midnight Pulse area of effect increased from 400 to 600
Faceless Void
Base agility increased from 21 to 23
Turn rate improved from 0.5 to 1
Gyrocopter
Homing Missile now hits invisible units
Homing Missile hits required to destroy increased from 3 to 3/3/4/5
Huskar
Burning Spears is no longer a Unique Attack Modifier
Invoker
Ghost Walk slow no longer affects magic immune enemies
EMP delay increased from 2.6 to 2.9
Jakiro
Dual Breath range increased by 50
Liquid Fire level 4 cooldown reduced from 5 to 4
Aghanim's Scepter Macropyre duration increased from 7 to 14
Aghanim's Scepter Macropyre range increased from 1350 to 1800 [?]
Juggernaut
Base attack time improved from 1.6 to 1.5
Keeper of the Light
Added Aghanim's Scepter upgrade: Provides permanent Spirit Form. Additionally, the following effects are active during the day: Keeper of the Light gains unobstructed vision and Illuminate heals allies for 75% of the damage values
Kunkka
Torrent area of effect increased from 215 to 225
X Marks The Spot can now last twice as long on allied heroes
Ghost Ship allied buff duration increased from 8 to 10
Add Ghost Ship AOE indicator for allies
Legion Commander
Overwhelming Odds bonus damage per hero is increased from 14/16/18/20 to 20/35/50/65 [?]
Overwhelming Odds area of effect increased from 315 to 330
Overwhelming Odds base damage rescaled from 50/100/150/200 to 60/100/140/180
Moment of Courage now uses Pseudo Random chance [?]
Leshrac
Lightning Storm now slows its targets by 75% for 0.5 seconds
Lich
Frost Armor can now be cast on buildings
Aghanim's Scepter Chain Frost no longer has a bounce limit
Lina
Attack range increased from 650 to 670
Aghanim's Scepter Laguna Blade damage goes through magic immunity [?]
Lion
Hex cooldown reduced from 30/25/20/15 to 30/24/18/12
Lone Druid
Spirit Bear health regeneration increased from 2 to 2/3/4/5
Luna
Base agility reduced from 22 to 18
Lycan
Shapeshift no longer provides 100/200/300 bonus health
Magnus
Removed Skewer maximum target limit
Skewer range increased from 600/800/1000/1200 to 750/900/1050/1200
Medusa
Split Shot reworked from 50/60/70/80% damage with 5 maximum targets, to 80% damage with 2/3/4/5 maximum targets
Mystic Snake no longer requires Fog of War vision to bounce
Mana Shield damage absorption per mana increased from 1/1.5/2/2.5 to 1.6/1.9/2.2/2.5
Meepo
Base movement speed increased from 305 to 315
Mirana
Sacred Arrow vision reduced from 800 to 650
Naga Siren
Mirror Image illusion damage dealt reduced from 30/35/40/45% to 20/25/30/35%
Rip Tide area of effect reduced from 350 to 320
Rip Tide negative armor no longer goes through magic immunity
Necrophos
Heartstopper Aura area of effect increased from 1000 to 1200
Reaper's Scythe now adds +30% duration to the respawn timer
Night Stalker
Darkness now also affects the vision of buildings
Nyx Assassin
Impale cooldown increased from 11 to 13
Impale can no longer be blocked by Linken's Sphere
Ogre Magi
Base armor increased by 1
Cast animation improved from 0.56 to 0.45
Omniknight
Purification area of effect increased from 225 to 240
Repel no longer removes positive buffs from allies [?]
Guardian Angel duration increased from 5/6/7 to 6/7/8
Aghanim's Scepter Guardian Angel duration increased from 5/6/7 to 8/9/10
Phantom Assassin
Stifling Dagger cooldown reduced from 8 to 6
Blur evasion chance increased from 20/25/30/40 to 20/30/40/50
Phoenix
Icarus Dive cast point extended from 0.01 to 0.2
Fire Spirits damage reduced from 15/35/55/75 to 10/30/50/70
Fire Spirits health cost increased from 15% to 20%
Pugna
Decrepify mana cost reduced from 100 to 60
Nether Ward duration increased from 25 to 30
Queen of Pain
Shadow Strike cooldown reduced from 20/16/12/8 to 16/12/8/4
Shadow Strike cast range increased from 400 to 435
Razor
Strength gain increased from 1.7 to 2.3
Unstable Current slow duration increased from 0.4/0.8/1.2/1.6 to 0.5/1/1.5/2
Riki
Backstab now works when attacking allied units
Shadow Demon
Added Aghanim's Scepter upgrade: Demonic Purge cooldown replaced with two charges that have a 40 second replenish time
Shadow Fiend
Requiem of Souls' secondary debuff now affects magic immune units
Silencer
Agility growth increased from 2.1 to 3.0
Curse of the Silent cooldown reduced from 20/18/16/14 to 20/16/12/8
Skywrath Mage
Base movement speed increased from 315 to 325
Concussive Shot damage increased from 50/100/150/200 to 60/120/180/240
Sniper
Fixed Sniper's acquisition range not matching his maximum attack range [?]
Spirit Breaker
Nether Strike cast range increased from 400/550/700 to 700 [?]
Nether Strike cooldown rebalanced from 75 to 80/70/60
Sven
Base damage increased by 6
Templar Assassin
Psionic Trap sub-ability now has the same cast point as the ability on the trap itself[?]
Terrorblade
Strength gain reduced from 1.9 to 1.4
Reflection slow no longer persists through magic immunity
Reflection duration rebalanced from 5 to 2.5/3.5/4.5/5.5
Tidehunter
Anchor Smash damage reduction increased from 40 to 60%
Anchor Smash now works on Ancient creeps[?]
Tinker
Heat Seeking Missile is no longer blocked by Ethereal
Tiny
Craggy Exterior stun duration rescaled from 1.2/1.3/1.4/1.5 to 1/1.25/1.5/1.75
Troll Warlord
Melee Whirling Axes cast point improved from 0.2 to 0
Tusk
Reworked Snowball into a two-part ability: one which creates the snowball, and a sub-ability to launch the snowball. You have up to 4 seconds to use the sub-ability. The area that automatically pulls allies in has been reduced. [?]
You can now load an ally into your snowball within 400 range by right clicking on them
Snowball moves 75 MS faster for each allied hero inside it
Snowball deals 20/30/40/50 extra damage for each additional hero in it
Undying
Soul Rip area of effect increased from 975 to 1300
Tombstone Zombie Deathlust's Max % health threshold increased from 5/10/15/20% to 20/25/30/35%
Tombstone Zombies no longer give any experience or gold [?]
Tombstone Bounty increased from 70/90/110/130 to 75/100/125/150
Flesh Golem's Plague Aura now affects magic immune units
Ursa
Fury Swipes is no longer a Unique Attack Modifier
Vengeful Spirit
When Vengeful Spirit is slain, her killer is inflicted with a negative Vengeance Aura, which decreases the damage of her killer and their nearby allies, until she revives [?]
Visage
Grave Chill cooldown increased from 10 to 16/14/12/10
Warlock
Shadow Word duration increased from 9 to 11
Upheaval cooldown reduced from 50 to 50/46/42/38
Windranger
Activating Windrun now disjoints incoming attack projectiles
Aghanim's Scepter Focus Fire damage reduction decreased from -50/-40/-30 to -30/-15/0, and no longer has special rules for procs
Witch Doctor
Maledict cooldown reduced from 35 to 20
Death Ward base attack time improved from 0.25 to 0.22
Wraith King
Mortal Strike damage ratio increased from 1.25/1.75/2.25/2.75 to 1.5/2/2.5/3
Base armor reduced by 1
Zeus
Arc Lightning cast point improved from 0.4 to 0.2
Lightning Bolt true sight range reduced from 900 to 750
Lightning Bolt flying vision range reduced from 1000 to 750
Lightning Bolt can now be cast on the ground, affecting the closest enemy hero in a 250 range
ITEMS
Animal Courier
Ground Courier respawn time reduced from 180 seconds to 140 seconds
Bloodstone
Bloodpact heal increased from 400 HP + 30 HP/charge to 500 HP + 30 HP/charge
Clarity
Mana regeneration from 100 over 30 seconds to 135 over 40 seconds
Eul's Scepter of Divinity
Cyclone now deals 50 damage to enemy units when they land
You can now cast Cyclone on yourself while you are magic immune
Manta Style
Mirror Image now resets the current attack and spell targeting priority [?]
Mjollnir
Chain Lightning damage reduced from 160 to 150
Static Shock area of effect is now centered around the unit with the Static Charge, rather than around the attacker
Fixed Chain Lightning not functioning properly when it procs while a previous proc is still bouncing [?]
Necronomicon
Necronomicon Warrior's movement speed rescaled from 330/360/390 to 350
Necronomicon units XP bounty increased from 59 to 100/150/200
Observer and Sentry Wards
Sharing wards with allies now requires a Control key override.[?]
Wards can no longer be placed in the fountain areas
Pipe of Insight
Pipe health regeneration reduced from 11 to 8
Pipe now provides Insight Aura, which grants 4 health regeneration to nearby allies
Pipe's active buff is no longer dispellable
Rod of Atos
Cripple ability cooldown reduced from 12 to 10
Scythe of Vyse
Hexed units' base movement speed increased from 100 to 140[?]
Shadow Amulet
Fade no longer requires the target to remain stationary [?]
Shadow Blade
Shadow Walk duration increased from 12 to 14
Town Portal Scroll
Added an option to require a halt command to in order to cancel a Town Portal Scroll
GENERAL
Roshan base armor increased by 1
Attack Speed now always continually adjusts based on the latest modifications applied to the unit [?]
Melee illusions created by a Rune of Illusion take 200% instead of 300% damage
Random Draft hero selection pool increased from 22 to 24
Captain's Draft hero selection pool increased from 24 to 27 (8 per type to 9)
Captain's Draft hero bans increased from 4 to 6
Meepo is no longer available in Ability Draft
HEROES
Abaddon
Aghanim's Scepter Borrowed Time now redirects 35% of all damage dealt to nearby allied heroes to Abaddon when active [?]
Ancient Apparition
Chilling Touch attack speed reduction increased from -15 to -20
Anti-Mage
Mana Void's area of effect increased from 450 to 500
Axe
Counter Helix now uses Pseudo Random chance [?]
Batrider
Flaming Lasso mana cost increased from 150 to 225
Beastmaster
Base damage increased by 4
Bloodseeker
Bloodrage cast point improved from 0.6 to 0.4
Bloodrage can no longer be dispelled [?]
Bounty Hunter
Track cast range increased from 900/1050/1200 to 1200
Brewmaster
If you have not attacked for 10 seconds, your next attack will always activate a Drunken Brawler critical hit
If you have not been attacked for 10 seconds, Drunken Brawler will cause you to evade the next attack[?]
Bristleback
Warpath no longer has unique values for the first movement speed stack[?]
Warpath movement speed stack bonus increased from 1/2/3% to 3/4/5% [?]
Broodmother
Spiderling's Poison Sting damage per second increased from 4 to 8
Spin Web's free pathing no longer deactivates when enemy has vision on Broodmother
Spin Web's free pathing is now disabled for 3 seconds when Broodmother takes damage [?]
Insatiable Hunger lifesteal increased from 40/60/80% to 60/80/100%
Centaur Warrunner
Hoof Stomp mana cost increased from 85/100/115/130 to 130
Chaos Knight
Phantasm now has a 50% chance to create one extra illusion when cast
Chen
Penitence cooldown reduced from 14 to 14/13/12/11
Clinkz
Death Pact cooldown reduced from 45 to 45/40/35
Dazzle
Poison Touch no longer causes a ministun[?]
Disruptor
Kinetic Field cooldown reduced from 14 to 14/13/12/11
Doom
Doom damage no longer ignores magic shields [?]
Drow Ranger
Gust knockback duration increased from 0.2 to 0.5
Earth Spirit
Stone Remnant recharge time reduced from 35 to 30
Earthshaker
Creeps no longer try to path around Fissure; they will wait for it to disappear
Echo Slam no longer ignores units that are invisible or in Fog of War
Elder Titan
Echo Stomp mana cost reduced from 100/115/130/145 to 100
Echo Stomp physical and magical damage increased from 80 to 80/85/90/95 each
Ember Spirit
Searing Chains duration reduced from 2/2/3/3 to 1/2/2/3 [?]
Sleight of Fist bonus damage reduced from 30/60/90/120 to 20/40/60/80
Enchantress
Untouchable slow duration increased from 3 to 4
Enigma
Midnight Pulse area of effect increased from 400 to 600
Faceless Void
Base agility increased from 21 to 23
Turn rate improved from 0.5 to 1
Gyrocopter
Homing Missile now hits invisible units
Homing Missile hits required to destroy increased from 3 to 3/3/4/5
Huskar
Burning Spears is no longer a Unique Attack Modifier
Invoker
Ghost Walk slow no longer affects magic immune enemies
EMP delay increased from 2.6 to 2.9
Jakiro
Dual Breath range increased by 50
Liquid Fire level 4 cooldown reduced from 5 to 4
Aghanim's Scepter Macropyre duration increased from 7 to 14
Aghanim's Scepter Macropyre range increased from 1350 to 1800 [?]
Juggernaut
Base attack time improved from 1.6 to 1.5
Keeper of the Light
Added Aghanim's Scepter upgrade: Provides permanent Spirit Form. Additionally, the following effects are active during the day: Keeper of the Light gains unobstructed vision and Illuminate heals allies for 75% of the damage values
Kunkka
Torrent area of effect increased from 215 to 225
X Marks The Spot can now last twice as long on allied heroes
Ghost Ship allied buff duration increased from 8 to 10
Add Ghost Ship AOE indicator for allies
Legion Commander
Overwhelming Odds bonus damage per hero is increased from 14/16/18/20 to 20/35/50/65 [?]
Overwhelming Odds area of effect increased from 315 to 330
Overwhelming Odds base damage rescaled from 50/100/150/200 to 60/100/140/180
Moment of Courage now uses Pseudo Random chance [?]
Leshrac
Lightning Storm now slows its targets by 75% for 0.5 seconds
Lich
Frost Armor can now be cast on buildings
Aghanim's Scepter Chain Frost no longer has a bounce limit
Lina
Attack range increased from 650 to 670
Aghanim's Scepter Laguna Blade damage goes through magic immunity [?]
Lion
Hex cooldown reduced from 30/25/20/15 to 30/24/18/12
Lone Druid
Spirit Bear health regeneration increased from 2 to 2/3/4/5
Luna
Base agility reduced from 22 to 18
Lycan
Shapeshift no longer provides 100/200/300 bonus health
Magnus
Removed Skewer maximum target limit
Skewer range increased from 600/800/1000/1200 to 750/900/1050/1200
Medusa
Split Shot reworked from 50/60/70/80% damage with 5 maximum targets, to 80% damage with 2/3/4/5 maximum targets
Mystic Snake no longer requires Fog of War vision to bounce
Mana Shield damage absorption per mana increased from 1/1.5/2/2.5 to 1.6/1.9/2.2/2.5
Meepo
Base movement speed increased from 305 to 315
Mirana
Sacred Arrow vision reduced from 800 to 650
Naga Siren
Mirror Image illusion damage dealt reduced from 30/35/40/45% to 20/25/30/35%
Rip Tide area of effect reduced from 350 to 320
Rip Tide negative armor no longer goes through magic immunity
Necrophos
Heartstopper Aura area of effect increased from 1000 to 1200
Reaper's Scythe now adds +30% duration to the respawn timer
Night Stalker
Darkness now also affects the vision of buildings
Nyx Assassin
Impale cooldown increased from 11 to 13
Impale can no longer be blocked by Linken's Sphere
Ogre Magi
Base armor increased by 1
Cast animation improved from 0.56 to 0.45
Omniknight
Purification area of effect increased from 225 to 240
Repel no longer removes positive buffs from allies [?]
Guardian Angel duration increased from 5/6/7 to 6/7/8
Aghanim's Scepter Guardian Angel duration increased from 5/6/7 to 8/9/10
Phantom Assassin
Stifling Dagger cooldown reduced from 8 to 6
Blur evasion chance increased from 20/25/30/40 to 20/30/40/50
Phoenix
Icarus Dive cast point extended from 0.01 to 0.2
Fire Spirits damage reduced from 15/35/55/75 to 10/30/50/70
Fire Spirits health cost increased from 15% to 20%
Pugna
Decrepify mana cost reduced from 100 to 60
Nether Ward duration increased from 25 to 30
Queen of Pain
Shadow Strike cooldown reduced from 20/16/12/8 to 16/12/8/4
Shadow Strike cast range increased from 400 to 435
Razor
Strength gain increased from 1.7 to 2.3
Unstable Current slow duration increased from 0.4/0.8/1.2/1.6 to 0.5/1/1.5/2
Riki
Backstab now works when attacking allied units
Shadow Demon
Added Aghanim's Scepter upgrade: Demonic Purge cooldown replaced with two charges that have a 40 second replenish time
Shadow Fiend
Requiem of Souls' secondary debuff now affects magic immune units
Silencer
Agility growth increased from 2.1 to 3.0
Curse of the Silent cooldown reduced from 20/18/16/14 to 20/16/12/8
Skywrath Mage
Base movement speed increased from 315 to 325
Concussive Shot damage increased from 50/100/150/200 to 60/120/180/240
Sniper
Fixed Sniper's acquisition range not matching his maximum attack range [?]
Spirit Breaker
Nether Strike cast range increased from 400/550/700 to 700 [?]
Nether Strike cooldown rebalanced from 75 to 80/70/60
Sven
Base damage increased by 6
Templar Assassin
Psionic Trap sub-ability now has the same cast point as the ability on the trap itself[?]
Terrorblade
Strength gain reduced from 1.9 to 1.4
Reflection slow no longer persists through magic immunity
Reflection duration rebalanced from 5 to 2.5/3.5/4.5/5.5
Tidehunter
Anchor Smash damage reduction increased from 40 to 60%
Anchor Smash now works on Ancient creeps[?]
Tinker
Heat Seeking Missile is no longer blocked by Ethereal
Tiny
Craggy Exterior stun duration rescaled from 1.2/1.3/1.4/1.5 to 1/1.25/1.5/1.75
Troll Warlord
Melee Whirling Axes cast point improved from 0.2 to 0
Tusk
Reworked Snowball into a two-part ability: one which creates the snowball, and a sub-ability to launch the snowball. You have up to 4 seconds to use the sub-ability. The area that automatically pulls allies in has been reduced. [?]
You can now load an ally into your snowball within 400 range by right clicking on them
Snowball moves 75 MS faster for each allied hero inside it
Snowball deals 20/30/40/50 extra damage for each additional hero in it
Undying
Soul Rip area of effect increased from 975 to 1300
Tombstone Zombie Deathlust's Max % health threshold increased from 5/10/15/20% to 20/25/30/35%
Tombstone Zombies no longer give any experience or gold [?]
Tombstone Bounty increased from 70/90/110/130 to 75/100/125/150
Flesh Golem's Plague Aura now affects magic immune units
Ursa
Fury Swipes is no longer a Unique Attack Modifier
Vengeful Spirit
When Vengeful Spirit is slain, her killer is inflicted with a negative Vengeance Aura, which decreases the damage of her killer and their nearby allies, until she revives [?]
Visage
Grave Chill cooldown increased from 10 to 16/14/12/10
Warlock
Shadow Word duration increased from 9 to 11
Upheaval cooldown reduced from 50 to 50/46/42/38
Windranger
Activating Windrun now disjoints incoming attack projectiles
Aghanim's Scepter Focus Fire damage reduction decreased from -50/-40/-30 to -30/-15/0, and no longer has special rules for procs
Witch Doctor
Maledict cooldown reduced from 35 to 20
Death Ward base attack time improved from 0.25 to 0.22
Wraith King
Mortal Strike damage ratio increased from 1.25/1.75/2.25/2.75 to 1.5/2/2.5/3
Base armor reduced by 1
Zeus
Arc Lightning cast point improved from 0.4 to 0.2
Lightning Bolt true sight range reduced from 900 to 750
Lightning Bolt flying vision range reduced from 1000 to 750
Lightning Bolt can now be cast on the ground, affecting the closest enemy hero in a 250 range
ITEMS
Animal Courier
Ground Courier respawn time reduced from 180 seconds to 140 seconds
Bloodstone
Bloodpact heal increased from 400 HP + 30 HP/charge to 500 HP + 30 HP/charge
Clarity
Mana regeneration from 100 over 30 seconds to 135 over 40 seconds
Eul's Scepter of Divinity
Cyclone now deals 50 damage to enemy units when they land
You can now cast Cyclone on yourself while you are magic immune
Manta Style
Mirror Image now resets the current attack and spell targeting priority [?]
Mjollnir
Chain Lightning damage reduced from 160 to 150
Static Shock area of effect is now centered around the unit with the Static Charge, rather than around the attacker
Fixed Chain Lightning not functioning properly when it procs while a previous proc is still bouncing [?]
Necronomicon
Necronomicon Warrior's movement speed rescaled from 330/360/390 to 350
Necronomicon units XP bounty increased from 59 to 100/150/200
Observer and Sentry Wards
Sharing wards with allies now requires a Control key override.[?]
Wards can no longer be placed in the fountain areas
Pipe of Insight
Pipe health regeneration reduced from 11 to 8
Pipe now provides Insight Aura, which grants 4 health regeneration to nearby allies
Pipe's active buff is no longer dispellable
Rod of Atos
Cripple ability cooldown reduced from 12 to 10
Scythe of Vyse
Hexed units' base movement speed increased from 100 to 140[?]
Shadow Amulet
Fade no longer requires the target to remain stationary [?]
Shadow Blade
Shadow Walk duration increased from 12 to 14
Town Portal Scroll
Added an option to require a halt command to in order to cancel a Town Portal Scroll