Spell Power

Spell Power (also Ability power) Modification increases or decreases the Spell Damage, Healing and Shields done by a Hero's Abilities. Summoned creatures (Zagara Roaches, Azmodan Demons, etc.) deal ability damage which can be enhanced by the Hero’s Spell Power in real-time.

A Spell Power value greater than 0% effectively increases the damage dealt or healing provided by the same percentage (ex: An ability that deals 100 damage would deal 140 damage with 40% spell power, 100+100*40% = 140). Similarly, a Spell Power value less than 0% effectively decreases the damage dealt or healing provided by that percentage (ex: An ability that deals 100 damage would deal 60 damage with -40% spell power, 100+100*-40% = 60). Damage modified by Spell Power is calculated the moment the target is hit.

Spell Power modification is calculated after Scaling and flat damage bonuses from Talents.

Spell Power does not affect Healing gained through Lifesteal, though can alter lifesteal amount based on spell damage by altering this damage.

Abilities and Talents that affect self Spell Power

• Chromie's level 1 talent, "Timewalker's Pursuit", grants her 5% increased Spell Power after she completes the quest.
• Chromie's level 14 talent, "Shifting Sands", adds an additional effect to her "Sand Blast" ability, granting her 8% increased Spell Power for 10 seconds for Hero hit, stacking up to 40%.
• Chromie's level 14 talent, "Quantum Overdrive", grants her 20% increased Spell Power for 10 seconds.
• Deckard's level 1 talent "Field Study" grants him 15% spell power for 14 seconds, stacking up to 30%.
• Gul'dan's level 7 talent, "Hunger for Power", permanently grants him 15% increased Spell Power, but reduces allied healing.
• Gul'dan's level 16 talent, "The Darkness Within", adds an additional effect to his "Life Tap" trait, granting him 25% increased Spell Power for the next ability he casts.
• Hanzo's level 7 talent, "The Dragon Hungers", adds an additional effect to his "Storm Bow" ability, granting him 5% increased Spell Power for 10 seconds for every Hero hit, stacking up to 20%.
• Kael'thas's level 1 talent, "Fel Infusion", permanently grants him 4% increased Spell Power.
• Kael'thas's level 7 talent, "Sunfire Enchantment", adds an additional effect to his "Verdant Spheres" ability, granting him 15% increased Spell Power for 10 seconds if his next 2 basic attacks hit heroes.
• Kel'Thuzad's trait, "Master of the Cold Dark", grants him 75% increased Spell Power after he completes the quest.
• Kel'Thuzad's level 16 talent, "Power of Icecrown", grants him 6% increased Spell Power for 10 seconds for every enemy Hero he stuns, slows or roots, stacking up to 30%.
• Kerrigan's level 16 talent, "Overdrive", grants her 25% increased Spell Power for 5 seconds.
• Li Li's level 13 talent, "Surging Winds", adds an additional effect to her "Blinding Winds" ability, granting her 10% increased Spell Power for 10 seconds if the ability hits at least 2 Heroes.
• Li-Ming's level 1 talent, "Power Hungry", makes Regeneration Globes increase her Spell Power by 10% for 20 seconds.
• Li-Ming's level 13 talent, "Glass Cannon", permanently grants her 15% increased Spell Power, but reduces her maximum Health.
• Li-Ming's level 20 talent, "Tal Rasha's Elements", grants her 5% increased Spell Power for every Ability used until the use of the same Ability, stacking up to 20%.
• Medivh's level 7 talent, "Force of Magic", adds an additional effect to his "Force of Will" ability, granting him 25% increased Spell Power for 15 seconds if it prevents a certain amount of damage, stacking up to 50%.
• Murky's level 4 talent, "Living the Dream", grants him 5% increased Spell Power for every 15 seconds he remains alive, stacking up to 15%.
• Nazeebo's level 16 talent, "Soul Harvest", grants him 7% increased Spell Power for every nearby enemy, up to 35%, for 15 seconds.
• Whitemane's level 7 talent, "Fanatical Power", grants her 50% increased Spell Power for 5 seconds.
• Yrel's level 13 talent, "Velen's Chosen", grants her 10% increased Spell Power for 10 seconds if a Hero is hit by a basic ability at maximum charge, stacking up to 30%.
• Zul'jin's level 1 talent, "Recklessness", grants him 10% increased Spell Power as long as he is below 75% health.

Abilities and Talents that affect allied Spell Power

• Ana's heroic ability, "Nano Boost", increases target allied Hero's Spell Power by 30% for 8 seconds.
• Probius' level 13 talent, "Power Overflowing", adds an additional effect to his "Warp In Pylon" trait, granting 10% increased Spell Power to the allied Heroes in his Pylon's Power Field.
• Auriel' level 16 talent, "Wrath of Heaven", adds an additional effect to her "Bestow Hope" trait, granting 10% increased Spell Power to the allied Heroes affected by it.
• Varian's level 16 talent, "Banner of Dalaran", grants allied Heroes 20% increased Spell Power in its area of effect for up to 12 seconds.
• Medivh's level 20 talent, "Arcane Brilliance", grants nearby allied Heroes 10% increased Spell Power for 10 seconds.

Abilities and Talents that affect enemy Spell Power

• Garrosh's level 4 talent, "Oppressor", makes his basic attacks reduce target enemy Hero's Spell Power by 40% for 2.5 seconds.
• Ana's level 7 talent, "Mind-Numbing Agent", adds an additional effect to her "Shrike" trait, reducing enemy Hero's Spell Power by 10% for every Dose active on them.
• Blaze's level 13 talent, "Suppressive Fire", adds an additional effect to his "Flame Stream" ability, reducing the Spell Power of enemy Heroes hit by 20% for every stream for 4 seconds, stacking up to 40%.
• Chen's level 13 talent, "Withering Flames", adds an additional effect to his "Breath of Fire" ability, reducing the Spell Power of enemy Heroes hit by 25% for 3 seconds.
• Valeera's level 13 talent, "Strangle", adds an additional effect to her "Garrote" ability, reducing the Spell Power of target enemy Hero by 40% for 6 seconds.
• Anub'arak's level 16 talent, "Debilitation", adds an additional effect to his "Burrow Charge" ability, reducing the Spell Power of enemy Heroes hit by 50% for 4 seconds.
• Probius' level 16 talent, "Interference", adds an additional effect to his "Warp Rift" ability, reducing the Spell Power of enemy Heroes hit by its detonation by 35% for 5 seconds.