TalentsLevel 10 Talent +14 Seaborn Sentinel Bonus Attack Damage replaced with +30 Bash of the Deep Damage
TalentsLevel 15 Talent +40 Bash of the Deep Damage replaced with -3 Corrosive Haze Armor
TalentsLevel 20 Talent -4 Corrosive Haze Armor replaced with +16% Seaborn Sentinel Bonus Attack Damage
Seaborn SentinelNo longer levels with Corrosive Haze
Seaborn SentinelBonus HP Regen changed from 2.5/5/7.5/10 to 1.75 + 0.25 per level
Seaborn SentinelAghanim's Scepter Bonus HP Regen decreased from +22 to +20
Seaborn SentinelBonus Armor changed from 3/4/5/6 to 1.8 + 0.2 per level
Seaborn SentinelAghanim's Scepter Bonus Armor decreased from +10 to +8
Seaborn SentinelFlat 8/16/24/32 bonus damage replaced with 11.4% bonus attack damage + 0.6% per level
Guardian SprintSlardar now has 100% slow resistance for the first 2.5s of Guardian Sprint. This bonus fades to 0 over the remaining duration

Jan 21, 2026

Slardar in 7.40c

Strength gain decreased from 3.6 to 3.4
TalentsLevel 15 Talent Health decreased from +300 to +250

Dec 15, 2025

Slardar in 7.40

TalentsLevel 10 Talent Seaborn Sentinel Bonus Damage increased from +12 to +14
Slithereen CrushPuddle radius increased from 250 to 325
Slithereen CrushAghanim's Scepter Crush puddle radius decreased from 450 to 400
Bash of the DeepBash Duration decreased from 1.1s to 1s
Bash of the DeepBonus Damage decreased from 50/100/150/200 to 35/90/145/200

May 22, 2025

Slardar in 7.39

Base Armor decreased by 1
Seaborn SentinelBonus Armor increased from 1/2/3/4 to 3/4/5/6
Seaborn SentinelAghanim's Scepter Bonus Armor decreased from 11 to 10
Seaborn Sentinel · ContextTotal Armor bonus with Scepter increased from 12/13/14/15 to 13/14/15/16

Feb 18, 2025

Slardar in 7.38

Leg Day · Guardian SprintSpeed Burst Duration increased from 2s to 2.5s
Brineguard · Corrosive HazeArmor transfer increased from 40% to 50%
TalentsLevel 10 Talent -2s Guardian Sprint Cooldown replaced with +2s Guardian Sprint Duration
TalentsLevel 10 Talent +0.2s Slithereen Crush Stun Duration replaced with +12 Seaborn Sentinel Bonus Damage
Seaborn SentinelHP Regen increased from 2/4/6/8 to 2.5/5/7.5/10
Seaborn SentinelHP Regen with Aghanim's Scepter increased from 24/26/28/30 to 24.5/27/29.5/32
Guardian SprintBonus Move Speed decreased from 10/20/30/40% to 10/18/26/34%
Slithereen CrushAghanim's Scepter bonus puddle radius rescaled from flat +300 to +80%
Slithereen Crush · ContextTotal puddle radius decreased from 550 to 450
Bash of the DeepNo longer deals bonus damage to creeps
Corrosive HazeTrail duration decreased from 8s to 7s
Corrosive Haze · ContextNow matches Slithereen Crush's Puddle Duration
Corrosive HazeNow upgraded with Aghanim's Scepter
Corrosive HazeIncreases trail duration by 5s and trail radius by 80% (from 100 to 180)

Aug 14, 2024

Slardar in 7.37b

TalentsLevel 15 Talent Health increased from +275 to +300

Jul 31, 2024

Slardar in 7.37

TalentsLevel 20 Talent Corrosive Haze Armor increased from -3 to -4
Slithereen CrushAghanim's Scepter Puddle Duration decreased from 15s to 12s
Slithereen CrushAghanim's Scepter Puddle Radius decreased from 600 to 550

Jun 6, 2024

Slardar in 7.36b

Agility gain decreased from 2.4 to 2.1
TalentsLevel 15 Talent Bash of the Deep Damage decreased from +50 to +40
TalentsLevel 15 Talent Health decreased from +325 to +275
Guardian SprintBonus Move Speed decreased from 25/30/35/40% to 10/20/30/40%

May 22, 2024

Slardar in 7.36

Innate Ability · Seaborn SentinelNew Innate ability. Passive, levels up with Corrosive Haze
Innate Ability · Seaborn SentinelSlardar gains bonus movement speed, health regeneration, attack damage, and armor while in a puddle or river. Health Regen: 2/4/6/8, Bonus Armor: 1/2/3/4, Bonus Movespeed: 18%, Bonus Damage: 8/16/24/32
Innate Ability · Seaborn SentinelAghanim's Scepter increases Health Regen by 22, Bonus Armor by 11 and provides 40% Status Resistance
Leg Day · Guardian SprintGrants a 2s speed burst on cast during which Slardar gains additional 8% speed bonus and 100% slow resistance, both of which then gradually fade out for another 3s, reaching normal ability values
Brineguard · Corrosive HazeAny active debuff on enemy hero provides 40% of the reduced armor to Slardar
Guardian SprintRiver-based bonuses and Aghanim's Scepter upgrade moved to Innate ability
Slithereen CrushAghanim's Shard no longer increases AoE by 75
Slithereen CrushAghanim's Scepter Puddle Duration decreased from 25s to 15s
Bash of the DeepBonus damage in water moved to Innate ability

Dec 14, 2023

Slardar in 7.35

TalentsLevel 20 Talent Slithereen Crush Damage decreased from +150 to +125
TalentsLevel 25 Talent Slithereen Crush Cooldown Reduction decreased from 4s to 3s
Slithereen CrushRadius decreased from 350 to 325

Oct 4, 2023

Slardar in 7.34d

Slithereen CrushCooldown decreased from 8s to 7s

Aug 14, 2023

Slardar in 7.34b

TalentsLevel 10 Talent Guardian Sprint Cooldown Reduction decreased from 3s to 2s
Bash of the DeepWater Bonus Damage decreased from 10/20/30/40 to 8/16/24/32

Aug 8, 2023

Slardar in 7.34

Slithereen CrushCast Point improved from 0.35s to 0.25s
Slithereen CrushPuddle Duration increased from 3/4/5/6s to 7s
Slithereen CrushPuddle Duration with Aghanim's Scepter increased from 22/23/24/25s to 25s
Bash of the DeepNow passively grants 10/20/30/40 attack damage when in water

Apr 20, 2023

Slardar in 7.33

TalentsLevel 20 Talent Corrosive Haze Armor decreased from -4 to -3
Slithereen CrushStun Duration decreased from 1s to 0.8s
Slithereen Crush · ContextDuration decreased as a part of the comprehensive Disables Reduction
Slithereen CrushDamage increased from 70/140/210/280 to 75/150/225/300
Bash of the DeepBash Duration decreased from 1.3s to 1.1s
Bash of the Deep · ContextDuration decreased as a part of the comprehensive Disables Reduction

Mar 6, 2023

Slardar in 7.32e

Corrosive HazeCast Range increased from 700/800/900 to 900

Sep 27, 2022

Slardar in 7.32c

Guardian SprintBonus River Movement Speed increased from 15% to 18%
Bash of the DeepStun Duration increased from 1.0/1.1/1.2/1.3s to 1.3s

Aug 23, 2022

Slardar in 7.32

TalentsLevel 10 Talent +10% Slithereen Crush Movement/Attack Slow replaced with +0.2s Slithereen Crush Stun Duration
TalentsLevel 15 Talent Bash of the Deep Damage decreased from +60 to +50
Guardian SprintNow passively grants 2/4/6/8 Health per second and 1/2/3/4 Armor while in water
Guardian SprintScepter Armor Bonus increased from 10 to 11
Slithereen CrushMana Cost rescaled from 90/100/110/120 to 100
Slithereen CrushNow creates a 250 radius puddle of water that lasts 3/4/5/6s (Scepter still makes a bigger puddle)

Feb 23, 2022

Slardar in 7.31

Sprint Passive River Speed reduced from 25% to 15%
TalentsLevel 20 Talent +125 Slithereen Crush damage increased to 150
Corrosive HazeTargets leave water trails for 8 seconds behind them

Sep 10, 2021

Slardar in 7.30c

TalentsLevel 20 Talent +100 Slithereen Crush damage increased to 125
Guardian SprintCooldown reduced from 32/27/22/17 to 29/25/21/17

Aug 17, 2021

Slardar in 7.30

TalentsLevel 10 Talent +20 Attack Damage replaced with -3s Guardian Sprint Cooldown
TalentsLevel 10 Talent +7 HP Regen replaced with +10% Slithereen Crush Attack/Move Speed Slow
TalentsLevel 20 Talent +25% Lifesteal replaced with +100 Slithereen Crush Damage
Guardian SprintCooldown increased from 17 to 32/27/22/17
Guardian SprintBonus Movement Speed increased from 16/24/32/40 to 25/30/35/40
Slithereen CrushDamage rescaled from 80/140/200/260 to 70/140/210/280

Apr 9, 2021

Slardar in 7.29

Sprint no longer unlocks max movement speed
Sprint river speed rescaled from 10/20/30/40% to 25%
TalentsLevel 10 Talent increased from +6 Health Regen to +7
TalentsLevel 15 Talent increased from +275 Health to +325
Slithereen CrushShard now applies the debuff before the damage
Slithereen CrushShard now also increases the radius by 75
Bash of the DeepNow does double damage against creeps

Jul 15, 2020

Slardar in 7.27b

TalentsLevel 20 Talent changed from +800 Vision to -4 Corrosive Haze Armor
TalentsLevel 25 Talent increased from -3.5s Slithereen Crush Cooldown to -4s
Corrosive HazeArmor reduction increased from 8/13/18 to 10/15/20

Apr 21, 2020

Slardar in 7.26a

Sprint speed reduced from 20/28/36/44% to 18/26/34/42%
ContextPart of the boots changes
Sprint river speed reduced from 25/48/66/94% to 25/45/65/85%
ContextPart of the boots changes

Feb 26, 2020

Slardar in 7.24b

Bash of the DeepDamage reduced from 60/115/170/225 to 50/100/150/200
Guardian SprintNow has a 25 manacost
Corrosive HazeReduced from 10/15/20 to 8/13/18

Jan 26, 2020

Slardar in 7.24

Base movement speed increased by 10
Bash of the DeepDamage rescaled from 75/125/175/225 to 60/115/170/225

Jul 14, 2019

Slardar in 7.22e

Corrosive HazeCast point reduced from 0.35 to 0.3
Corrosive HazeCast range increased from 700 to 700/800/900

Jun 30, 2019

Slardar in 7.22d

Aghanim's Scepter regen bonus increased from 25 to 35
TalentsLevel 10 Talent increased from +6 Health Regen to +8
TalentsLevel 15 Talent increased from +300 Health to +350

Jun 9, 2019

Slardar in 7.22c

Base health regen increased from 0 to 0.5

May 24, 2019

Slardar in 7.22

Added Scepter upgrade. Slithereen Crush now creates a puddle of water that is considered a river for bonuses. Provides +25 HP regen, +12 Armor and +40% Status Resistance while in a Puddle or River (in addition to the normal Guardian Sprint River bonuses). Puddle AoE is 550. Puddles last for 25 seconds.
TalentsLevel 25 Talent changed from +1.25s Slithereen Crush Stun to -4.5 Slithereen Crush Cooldown
Guardian SprintNow passively provides an extra 5/20/35/50% movement boost in the river with unlocked max speed, rather than a fixed 700 at level 4 when activated.

Jan 29, 2019

Slardar in 7.21

TalentsLevel 25 Talent reduced from +1.5s Slithereen Crush Stun to 1.25s

Nov 24, 2018

Slardar in 7.20c

TalentsLevel 20 Talent changed from +50 Attack Speed to +30% Lifesteal

Nov 19, 2018

Slardar in 7.20

Base armor increased by 1
TalentsLevel 15 Talent changed from +100 Bash Damage to +75
TalentsLevel 25 Talent changed from +15% Bash Chance to +1.5s Slithereen Crush Stun
Bash of the DeepHas been reworked
Slithereen CrushBonuses have been reworked

May 27, 2018

Slardar in 7.16

Bash of the DeepDamage increased from 60/80/100/120 to 80/100/120/140

Mar 29, 2018

Slardar in 7.12

Guardian SprintNo longer has a 15% damage amplification
Guardian SprintDuration reduced from 12 to 10

Mar 1, 2018

Slardar in 7.10

Talent: Level 10 Talent increased from +20 to +25 Damage

Source: Valve’s public Dota 2 data feeds. Notes belong to Valve. Dates use Bellevue time (Pacific).