Item passive stacking


Info

Item passive stacking describes the interactions between multiple items that have similar effects. The stacking of items fall into different categories, and the stacking of each category is handled differently.

Independent stacking

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Multiplicative stacking

Values that are stacked multiplicatively have diminishing returns. The stacking effect can be calculated by the formula "1-(1-x)*(1-y)*(1-z)*..." where the variables x,y and z represent the individual percentages.

Magic resistance

Magic resistance stacks multiplicatively. For example when a spell deals 100 magical damage, a hero`s natural 25% magic resistance reduces it to 75 damage. Now when that hero has a Hood of Defiance, the 75 damage get reduced by 30% down to 52.5 damage. If he has a 2nd hood, that 52.5 damage get reduced by 30% down to 36.75 damage, etc. Let`s take Anti-mage (25% base magic resistance) with level 4 Spell Shield (50% magic resistance) and a Hood of Defiance   Item   Changelogs     Hood of DefianceBL A furred, magic resistant headpiece that is feared by wizards. Cost1725 Bought FromArmor Active Barrier Bonus +8 Health regeneration+25% Magic resistance Disassemble? No Alert allies? No dota2 (30% magic resistance): 1-(1-0.25)*(1-0.50)*(1-0.30)=0.7375 = 73.75% magic resistance.

Limited stacking

Those events stack multiplicatively, but in case two events happen at the same time, only the highest value is kept or the duration is refreshed.

Critical Strike

The highest multiplier has priority in case two crits happen at the same time.

For example Tusk   Hero   Strategy   Counters   Equipment   Gear   Responses   Sounds   Lore   Old Abilities   Changelogs     Tusk 23 + 2.6 23 + 2.1 18 + 1.7 Level Base dota2 holding a Daedalus   Item   Old Abilities   Changelogs     Daedalus A weapon of incredible power that is difficult for even the strongest of warriors to control. Cost5320 (1000) Bought FromWeapons Passive Critical Strike Bonus +80 dota2 (230%) cannot crit while using Walrus PUNCH! (350% ).

Damage Block

Only one instance of Damage Block can proc at a time. The highest damage block value has priority.

Tidehunter   Hero   Strategy   Counters   Equipment   Gear   Responses   Sounds   Lore   Old Abilities   Changelogs     Tidehunter 22 + 3.3 15 + 1.5 16 + 1.7 Level Base dota2 has no use for a Stout Shield   Item   Changelogs     Stout ShieldBL One man s wine barrel bottom is another man s shield. Cost200 Bought FromArmaments Passive Damage Block Disassemble? No Alert allies? No Recipe The Stout Shield is an item dota2 (16), once he skilled Kraken Shell (12/24/36/48) past level 2.

Maim

Info Needed

Bloodstone

Multiple Bloodstone See the in-game item. For the Beta memorial gems, see Bloodstone of the Ancestor, Bloodstone of the Precursor, and Bloodstone of the Founder.   Item   Changelogs     Bloodstone The Bloodstone s dota2 s do not reduce respawn time further. Only the Bloodstone See the in-game item. For the Beta memorial gems, see Bloodstone of the Ancestor, Bloodstone of the Precursor, and Bloodstone of the Founder.   Item   Changelogs     Bloodstone The Bloodstone s dota2 in the highest priority slot works.

Priority slots are as follows:

1 2 3
4 5 6

Bash

The strength and damage components of multiple Skull Basher   Item   Changelogs     Skull BasherB A feared weapon in the right hands, this maul s ability to shatter the defenses of its opponents should not be underestimated. Cost2700 (750) Bought FromWeapons Passive Bash dota2 s and Abyssal Blade   Item   Lore   Changelogs     Abyssal Blade The lost blade of the Commander of the Abyss, this edge cuts into an enemy s soul. Cost6400 (1550) Bought FromWeapons Active Overwhelm Passive Bash, Damage dota2 s will independently stack, but the bash chance will not.

Chain Lightning

The attack speed and damage components of multiple Maelstrom   Item   Changelogs     MaelstromB A hammer forged for the gods themselves, Maelstrom allows its user to harness the power of lightning. Cost2800 (700) Bought FromArtifacts Passive Chain Lightning Bonus +25 Attack speed+24 dota2 s and Mjollnir   Item   Changelogs     Mjollnir Thor s magical hammer, made for him by the dwarves Brok and Eitri. Cost5700 (900) Bought FromArtifacts Active Static Charge Passive Chain Lightning Bonus +80 Attack speed+24 Attack damage dota2 s will independently stack, but the chain lightning chance will not.

Auras

Auras provided by items do not stack with themselves, since they place a buff/debuff on the unit. Only the aura with the highest value will work. Note that some items share a specific aura ( Ring of Basilius   Item   Changelogs     Ring of BasiliusB Ring given as a reward to the greatest mages. Cost500 Bought FromSupport Passive Basilius Aura Bonus +7 Attack damage Disassemble? Yes Alert allies? No Recipe The dota2 and Vladmir`s Offering   Item   Changelogs     Vladmir s OfferingB An eerie mask that is haunted with the malice of a fallen vampire. Cost2275 Bought FromSupport Passive Vladmir s Aura Bonus +2 Strength+2 Agility+2 Intelligence Disassemble? No Alert dota2 ). In this case, only Vladmir`s Offering   Item   Changelogs     Vladmir s OfferingB An eerie mask that is haunted with the malice of a fallen vampire. Cost2275 Bought FromSupport Passive Vladmir s Aura Bonus +2 Strength+2 Agility+2 Intelligence Disassemble? No Alert dota2 `s mana regeneration aura and armor aura will work.

Unique Attack Modifiers

An attack can only have one Unique Attack Modifier Unique Attack Modifiers (abbreviated UAM; formerly known as Orb Effects) are special attack modifiers that cannot be used simultaneously with each other—one always takes priority. They may be provided by abilities (e.g. Anti-Mage s Mana Break), . Priorities are explained here.