Spell damage

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  Spell damage   Spell damage sources    
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Spell damage is all damage which is not dealt by physical attacks. This includes all spells which deal magical, physical or pure damage. Even the damage dealt by attack modifiers counts as spell damage, as long as the effect deals its damage in a separate instance from the attack damage.

Magic spell damage is influenced by magic resistance, physical spell damage is influenced by armor and pure damage is not affected by either. All three underlie damage manipulation.

Sources of spell damage[edit | edit source]

Spell amplification[edit | edit source]

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Spell damage can be directly amplified. Each point of Intelligence attribute symbol.png Intelligence increases a hero's spell damage by 0.0667%, which equates to 1% spell damage for every 15 points of intelligence. Spell damage amplification of multiple sources stacks additively. The amplification does not only affect spell damage dealt against enemies, it also causes damage afflicted to allies or the own unit to get amplified.

Currently there is no unit ability that directly amplifies spell damage, but a couple of heroes have perks in the talents tree.

Spell damage increasing abilities

These items passively increase the owner's spell damage amplification by merely having them equipped. They either grant a flat bonus, or bonus through intelligence.


Spell damage increasing items (One value point equals 1% spell damage amplification)
Item Value Item cost Cost per value point
Aether Lens icon.png Aether Lens 5 2350 470
Aghanim's Scepter icon.png Aghanim's Scepter 0.67 4200 6268.66
Blade Mail icon.png Blade Mail 0.67 2200 3283.58
Bloodthorn icon.png Bloodthorn 1.67 7195 4308.38
Bracer icon.png Bracer 0.2 505 2525
Buckler icon.png Buckler 0.13 800 6153.85
Circlet icon.png Circlet 0.13 165 1269.23
Crimson Guard icon.png Crimson Guard 0.13 3550 27307.69
Dagon 1 icon.png Dagon 1 1.07 2720 2542.06
Dagon 2 icon.png Dagon 2 1.27 3970 3125.98
Dagon 3 icon.png Dagon 3 1.47 5220 3551.02
Dagon 4 icon.png Dagon 4 1.67 6470 3874.25
Dagon 5 icon.png Dagon 5 1.87 7720 4128.34
Diffusal Blade 1 icon.png Diffusal Blade 1 0.67 3150 4701.49
Diffusal Blade 2 icon.png Diffusal Blade 2 1 3850 3850
Drum of Endurance icon.png Drum of Endurance 0.4 1655 4137.5
Echo Sabre icon.png Echo Sabre 0.67 2650 3955.22
Ethereal Blade icon.png Ethereal Blade 0.67 4700 7014.93
Eul's Scepter of Divinity icon.png Eul's Scepter of Divinity 0.67 2750 4104.48
Eye of Skadi icon.png Eye of Skadi 1.67 5775 3458.08
Force Staff icon.png Force Staff 0.67 2225 3320.9
Ghost Scepter icon.png Ghost Scepter 0.33 1500 4545.45
Guardian Greaves icon.png Guardian Greaves 0.33 5375 16287.88
Headdress icon.png Headdress 0.13 675 5192.31
Helm of the Dominator icon.png Helm of the Dominator 0.13 1975 15192.31
Hurricane Pike icon.png Hurricane Pike 0.67 4625 6902.99
Iron Branch icon.png Iron Branch 0.07 50 714.29
Linken's Sphere icon.png Linken's Sphere 1 4850 4850
Magic Wand icon.png Magic Wand 0.27 465 1722.22
Manta Style icon.png Manta Style 0.67 5000 7462.69
Mantle of Intelligence icon.png Mantle of Intelligence 0.2 150 750
Mekansm icon.png Mekansm 0.33 2375 7196.97
Mystic Staff icon.png Mystic Staff 1.67 2700 1616.77
Necronomicon 1 icon.png Necronomicon 1 1 2650 2650
Necronomicon 2 icon.png Necronomicon 2 1.4 3850 2750
Necronomicon 3 icon.png Necronomicon 3 1.6 5050 3156.25
Null Talisman icon.png Null Talisman 0.4 470 1175
Oblivion Staff icon.png Oblivion Staff 0.67 1650 2462.69
Octarine Core icon.png Octarine Core 1.67 5900 3532.93
Orchid Malevolence icon.png Orchid Malevolence 1.67 4075 2440.12
Power Treads (Intelligence) icon.png Power Treads (Intelligence) 0.67 1350 2014.93
Ring of Aquila (Active) icon.png Ring of Aquila 0.2 985 4925
Robe of the Magi icon.png Robe of the Magi 0.4 450 1125
Rod of Atos icon.png Rod of Atos 2 3100 1550
Scythe of Vyse icon.png Scythe of Vyse 2.33 5700 2446.35
Shiva's Guard icon.png Shiva's Guard 2 4700 2350
Silver Edge icon.png Silver Edge 1 5350 5350
Staff of Wizardry icon.png Staff of Wizardry 0.67 1000 1492.54
Ultimate Orb icon.png Ultimate Orb 0.67 2150 3208.96
Veil of Discord icon.png Veil of Discord 0.8 2240 2800
Vladmir's Offering icon.png Vladmir's Offering 0.13 2375 18269.23
Wraith Band icon.png Wraith Band 0.2 485 2425
Values may include portions from actives or auras.

Unaffected by amplification[edit | edit source]

There are certain cases of abilities that ignore spell amplification. It's important to note that those spells cannot spell lifesteal, too.

In general abilities related to health manipulation (instantly killing effect, health cost, delayed damage) abilities and or regular attacks (cleave, instant attacks) don't benefit from spell amplification as well. The exception to this rule is splash, which is still amplified.

1 The rum wear-off damage is not amplified.

2 The AoE health drain is not amplified.

See also[edit | edit source]