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Diffusal Blade
Diffusal Blade 1 icon.png
An enchanted blade that allows the user to cut straight into the enemy's soul.
3150 (700)
Bought From
Active Inhibit
Passive [?] Manabreak
Bonus [?] +24 Agility
+12 Intelligence
Disassemble? No
Alert allies? No
Diffusal Blade (3150)Components4.png
Blade of Alacrity (1000)
Blade of Alacrity (1000)
Robe of the Magi (450)
Recipe (700)

The Diffusal Blade is an item purchasable at the Main Shop, under Artifacts.

Additional Information[]


Targets an enemy, slowing it for 4 seconds.
Cast Range: 600
Move Speed Slow: 100%
Non-Hero Root Duration: 3
Slow Duration: 4
Cooldown: 15
Mana: 0
Debuff modifier_item_diffusal_blade_slow: Dispellable with any dispel.
Debuff modifier_rooted: Dispellable with any dispel.


  • The slow decreases in 0.8 second intervals, so it slows for 100%/80%/60%/40%/20%, going one step down every 0.8 seconds.
  • When cast on non-hero units, it roots the target for the initial 3 seconds, preventing it from moving and casting certain mobility spells.
    • The slow is still applied to the target, so that it still is slowed for the remaining duration once the root wears off.
    • Does not provide True Sight over the target.

Can be used by illusions. Does not pierce spell immunity.
Each attack burns 40 mana from the target, and deals 1 physical damage per burned mana.

Burns 12 mana per attack from melee illusions and 8 mana per attack from ranged illusions.
Mana Burned per Hit (Hero): 40
Mana Burned per Hit (Melee Illusion): 12
Mana Burned per Hit (Ranged Illusion): 8
Burned Mana as Damage: 100%
Can be used by illusions. The amount of mana burned is reduced for illusions.


  • The bonus damage is dealt in one instance together with the attack damage, and counts as attack damage as well.
    • It can be lifestealed off of and cleave, but it is not considered by crit.
    • It is also not affected by percentage-based attack damage bonuses or reductions, but can be reduced with flat reductions.
  • Effectively increases the owner's attack damage by 40 against units which have enough mana to burn.
    • Effectively increases the attack damage of an illusion by 12/8 (melee/ranged) against units which have enough mana to burn.
  • Applies the mana loss first, and then the damage.
  • Does not work against allied units when attacking them.

Recommended Heroes[]

Naga Siren icon.png
  • With Manabreak, Naga Siren and all her Mirror Images drain a total of 98 mana per attack, assuming all illusions are attacking one hero. The added agility also increases the damage of her illusions.
  • Inhibit is also an effective slow for situations in which Ensnare is not usable.
Phantom Lancer icon.png
  • In conjunction with Juxtapose, Spirit Lance and Doppelganger, 14 illusions plus Phantom Lancer minimap icon.png Phantom Lancer himself will deal a total of 274 Mana Burn per attack, assuming all illusions are attacking one hero. 306 if Manta Style icon.png Manta Style illusions are included.
  • Inhibit complements his Spirit Lance and makes it even easier for his illusions to stick to and focus down targets.
  • Burning mana with Manabreak is relatively easy for Phantom Lancer because he has so many illusions available. Even the 0%-damage illusion from Doppelganger burns mana.
Riki icon.png
  • Inhibit keeps enemies in his Smoke Screen longer, and can also be used on enemies caught with Blink Strike to increase his chasing potential.
  • Inhibit may keep enemies inside Tricks of the Trade's area of effect, helping to achieve its full damage potential.
  • Manabreak works with each Tricks of the Trade attack, burning mana and dealing heavy damage.
  • Cloak and Dagger lets Riki benefit even more than usual from Diffusal's bonus agility.
Spectre icon.png
  • Manabreak gives Illusions from Haunt an additional damage source. It also ensures that, when she ults, the entire enemy team overall will have somewhat less mana available.
  • Inhibit allows Spectre to slow enemies she catches with Reality and keep them isolated for Desolate even longer.
  • The above can also be further exploited with Manta Style icon.png Manta Style. Haunt and Reality to find an enemy, Inhibit to keep them still, and Manta Style icon.png Manta Style illusions to burst them down with Manabreak and Desolate attacks.


  • The bonus attributes and the Manabreak ability make Diffusal Blade a cost-effective damage item on Agility attribute symbol.png agility carries/heroes in general.

Effective against[]

Wraith King icon.png
  • Because Wraith King requires mana to come back with Reincarnation, Manabreak can drain his mana pool before he dies and thus prevent it from ever activating. However, do note that Manabreak can be fully blocked by Black King Bar icon.png Black King Bar (a common purchase on Wraith King), and that Wraith King can buy Aghanim's Shard icon.png Aghanim's Shard to make Reincarnation cost 0 mana (though preventing Wraithfire Blast can also be impactful). If you do need to drain his mana faster, consider buying more attack speed items and/or Manta Style icon.png Manta Style.
Medusa icon.png
  • Manabreak deals more effective Damage against Medusa because it depletes her mana pool directly; the sooner she runs out of mana, the sooner she will be unable to mitigate damage with her Mana Shield.


  • Because of the way Manabreak interacts with illusions, Diffusal Blade is most common and most effective on heroes with easy access to them, such as Phantom Lancer.
  • Similarly, this is also why Manta Style and Diffusal Blade are so commonly seen together: after picking up one of the two, the other becomes that much more effective and attractive to buy.
  • The movement slow is an effective way to kite melee characters and can both increase your team's damage output vs them (by preventing them from running away and making it easier to hit them with spells), and reduce their damage output vs your team (by preventing them from getting close enough to hit anything).
  • The movement slow can help your illusions and/or summoned units stick to their attack target.

Items Synergy[]

  • Manta Style icon.png Manta Style illusions make full use of Diffusal's Manabreak ability and can focus-fire the target of Diffusal's active movement slow.


  • The Manabreak passive used to be called Feedback and got changed at some point without notification.


Recent Changes[]

  • Increased Agility attribute symbol.png agility bonus from 20 to 24.
  • Increased Intelligence attribute symbol.png intelligence bonus from 10 to 12.
  • Manabreak
    • Increased damage per burned mana from 80% to 100%.
    • Reduced mana burned per attack for illusions from 16/8 to 12/8.
  • Reduced Manabreak mana burned per attack from 50 to 40.
  • Can no longer be upgraded.
  • Purge
    • No longer applies a basic dispel on the target.
    • No longer has 8 charges.
    • Increased cooldown from 4 to 15.