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Spell damage

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Spell damage
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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, as well as all items with abilities that deal 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]

Spell amplification[edit]

Spell damage can be directly amplified. Each point of Intelligence attribute symbol.png Intelligence increases a hero's spell damage by 0.07%, 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
Aghanim's Scepter icon.png Aghanim's Scepter 0.7 4200 6000
Blade Mail icon.png Blade Mail 0.7 2200 3142.86
Bloodthorn icon.png Bloodthorn 1.75 7205 4117.14
Bracer icon.png Bracer 0.21 465 2214.29
Buckler icon.png Buckler 0.14 800 5714.29
Circlet icon.png Circlet 0.14 165 1178.57
Crimson Guard icon.png Crimson Guard 0.14 3550 25357.14
Diffusal Blade 1 icon.png Diffusal Blade 0.7 3150 4500
Drum of Endurance icon.png Drum of Endurance 0.42 1615 3845.24
Echo Sabre icon.png Echo Sabre 0.7 2650 3785.71
Ethereal Blade icon.png Ethereal Blade 0.7 4700 6714.29
Eul's Scepter of Divinity icon.png Eul's Scepter of Divinity 0.7 2750 3928.57
Eye of Skadi icon.png Eye of Skadi 1.75 5500 3142.86
Force Staff icon.png Force Staff 0.7 2250 3214.29
Ghost Scepter icon.png Ghost Scepter 0.35 1500 4285.71
Guardian Greaves icon.png Guardian Greaves 0.35 5450 15571.43
Headdress icon.png Headdress 0.14 650 4642.86
Helm of the Dominator icon.png Helm of the Dominator 0.14 2000 14285.71
Hurricane Pike icon.png Hurricane Pike 0.91 4615 5071.43
Iron Branch icon.png Iron Branch 0.07 50 714.29
Kaya icon.png Kaya 11.12 1950 175.36
Linken's Sphere icon.png Linken's Sphere 0.91 5050 5549.45
Magic Wand icon.png Magic Wand 0.21 450 2142.86
Manta Style icon.png Manta Style 0.7 4800 6857.14
Mantle of Intelligence icon.png Mantle of Intelligence 0.21 135 642.86
Mekansm icon.png Mekansm 0.35 2350 6714.29
Meteor Hammer icon.png Meteor Hammer 0.84 2625 3125
Mystic Staff icon.png Mystic Staff 1.75 2700 1542.86
Null Talisman icon.png Null Talisman 0.49 465 948.98
Oblivion Staff icon.png Oblivion Staff 0.7 1650 2357.14
Octarine Core icon.png Octarine Core 1.75 5900 3371.43
Orchid Malevolence icon.png Orchid Malevolence 1.75 4075 2328.57
Power Treads (Intelligence) icon.png Power Treads (Intelligence) 0.7 1450 2071.43
Ring of Aquila (Active) icon.png Ring of Aquila 0.21 965 4595.24
Robe of the Magi icon.png Robe of the Magi 0.42 450 1071.43
Rod of Atos icon.png Rod of Atos 1.4 2930 2092.86
Scythe of Vyse icon.png Scythe of Vyse 2.45 5700 2326.53
Shiva's Guard icon.png Shiva's Guard 2.1 4750 2261.9
Silver Edge icon.png Silver Edge 1.05 5550 5285.71
Spirit Vessel icon.png Spirit Vessel 0.14 2975 21250
Staff of Wizardry icon.png Staff of Wizardry 0.7 1000 1428.57
Ultimate Orb icon.png Ultimate Orb 0.7 2150 3071.43
Urn of Shadows icon.png Urn of Shadows 0.14 875 6250
Veil of Discord icon.png Veil of Discord 0.98 2330 2377.55
Vladmir's Offering icon.png Vladmir's Offering 0.14 2250 16071.43
Wraith Band icon.png Wraith Band 0.21 465 2214.29
Values may include portions from actives or auras.

Unaffected by amplification[edit]

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

In general abilities related to health manipulation (instantly killing effect, health cost, delayed damage) and regular attacks (cleave, instant attacks) do not benefit from spell amplification. The exceptions to this rule are splash, Tree Grab, and Psi Blades which are still amplified.

Version history[edit]

  • Damage return from Blade Mail is no longer increased by Spell Amplification
  • Moon Glaives no longer gets boosted by Spell Amplification.
  • Cleave no longer gets boosted by Spell Amplification.
  • Spell Lifesteal does not trigger heal for things that don't receive spell amplification (Moon Glaives, Cleave).

See also[edit]