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 the hero's spell damage by 0.0625%, which equals to 1% spell damage for every 16 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 0.63 4200 6720
Blade Mail icon.png Blade Mail 0.63 2200 3520
Bloodthorn icon.png Bloodthorn 1.56 7195 4604.8
Bracer icon.png Bracer 0.19 505 2693.33
Buckler icon.png Buckler 0.13 800 6400
Circlet icon.png Circlet 0.13 165 1320
Crimson Guard icon.png Crimson Guard 0.13 3550 28400
Dagon 1 icon.png Dagon 1 1 2720 2720
Dagon 2 icon.png Dagon 2 1.19 3970 3343.16
Dagon 3 icon.png Dagon 3 1.38 5220 3796.36
Dagon 4 icon.png Dagon 4 1.56 6470 4140.8
Dagon 5 icon.png Dagon 5 1.75 7720 4411.43
Diffusal Blade 1 icon.png Diffusal Blade 1 0.63 3150 5040
Diffusal Blade 2 icon.png Diffusal Blade 2 0.94 3850 4106.67
Drum of Endurance icon.png Drum of Endurance 0.38 1655 4413.33
Echo Sabre icon.png Echo Sabre 0.63 2650 4240
Ethereal Blade icon.png Ethereal Blade 0.63 4700 7520
Eul's Scepter of Divinity icon.png Eul's Scepter of Divinity 0.63 2750 4400
Eye of Skadi icon.png Eye of Skadi 1.56 5775 3696
Force Staff icon.png Force Staff 0.63 2225 3560
Ghost Scepter icon.png Ghost Scepter 0.31 1500 4800
Guardian Greaves icon.png Guardian Greaves 0.31 5375 17200
Headdress icon.png Headdress 0.13 675 5400
Helm of the Dominator icon.png Helm of the Dominator 0.13 1975 15800
Hurricane Pike icon.png Hurricane Pike 0.63 4625 7400
Iron Branch icon.png Iron Branch 0.06 50 800
Linken's Sphere icon.png Linken's Sphere 0.94 4850 5173.33
Magic Wand icon.png Magic Wand 0.25 465 1860
Manta Style icon.png Manta Style 0.63 5000 8000
Mantle of Intelligence icon.png Mantle of Intelligence 0.19 150 800
Mekansm icon.png Mekansm 0.31 2375 7600
Mystic Staff icon.png Mystic Staff 1.56 2700 1728
Necronomicon 1 icon.png Necronomicon 1 0.94 2650 2826.67
Necronomicon 2 icon.png Necronomicon 2 1.31 3850 2933.33
Necronomicon 3 icon.png Necronomicon 3 1.5 5050 3366.67
Null Talisman icon.png Null Talisman 0.38 470 1253.33
Oblivion Staff icon.png Oblivion Staff 0.63 1650 2640
Octarine Core icon.png Octarine Core 1.56 5900 3776
Orchid Malevolence icon.png Orchid Malevolence 1.56 4075 2608
Power Treads (Intelligence) icon.png Power Treads (Intelligence) 0.56 1350 2400
Ring of Aquila (Active) icon.png Ring of Aquila 0.19 985 5253.33
Robe of the Magi icon.png Robe of the Magi 0.38 450 1200
Rod of Atos icon.png Rod of Atos 1.88 3100 1653.33
Scythe of Vyse icon.png Scythe of Vyse 2.19 5700 2605.71
Shiva's Guard icon.png Shiva's Guard 1.88 4700 2506.67
Silver Edge icon.png Silver Edge 0.94 5350 5706.67
Staff of Wizardry icon.png Staff of Wizardry 0.63 1000 1600
Ultimate Orb icon.png Ultimate Orb 0.63 2150 3440
Veil of Discord icon.png Veil of Discord 0.75 2240 2986.67
Vladmir's Offering icon.png Vladmir's Offering 0.13 2375 19000
Wraith Band icon.png Wraith Band 0.19 485 2586.67
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]