Mana
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Mana (also known as MP, which is short for mana points) represents the magic power of a unit. It is used as a cost for the majority of active and even some passive abilities. Every hero has a base mana pool of 75, while most non-heroes only have a set mana pool if they have abilities which require mana, with a few exceptions. The mana values are set and can't be altered. This means a unit's maximum mana pool can never drop below its set value. However, a hero's mana pool gets bigger for every intelligence point they have. Each point of intelligence increases a hero's mana pool by 12. Since every hero has some base intelligence and gains intelligence as they level up, their mana pool gets bigger the higher their level is. A hero's base intelligence cannot drop below 1, however, it is possible to reach 0 with the help of negative bonus intelligence.
Note: Although gaining/losing intelligence usually does not increase a hero's current mana, some abilities which grant/reduce intelligence are coded so that they also increase/reduce current mana, instead of only maximum mana.
Contents
Display[edit]
The mana of a unit is displayed in the HUD. For some units, it also may be displayed in the game world.
HUD mana bar[edit]
Mana of the selected unit is displayed in the HUD as a blue bar at the bottom of the screen. The left number at the center of the bar is the unit's current mana points and the right number is its maximum mana points. Though not displayed in the HUD, a unit's total mana does use decimal numbers. The visible numbers in the HUD are always rounded up.
The mana regeneration value is visible on mana bars in the HUD of every unit. Though the HUD shows only one decimal for mana regeneration, it uses more decimals. The value in the HUD is rounded up.
Over-head mana bar[edit]
The mana bar of heroes and creep-heroes are displayed right above their heads, below their health bar. Even when a creep-hero has no mana pool, a mana bar is still drawn below their health bar above them. Other units do not have an overhead mana bar.
There are no different types of mana bars. They do not have lines like the health bars and do not differ from each other in any way.
Modifying mana[edit]
Some heroes, units (neutral creeps and summoned units) and items have abilities that can affect the mana pool of one or multiple units.
Current mana increasing abilities[edit]
Just like healing health, a unit's current mana can be increased by many abilities, mostly referred to as restoring mana. Restoring mana cannot increase the unit's mana beyond its maximum mana pool. Spells may restore mana in a burst on a target, restoring an amount of mana in an instance, or restore mana over time, where the amount is split up in multiple instances. The difference between restoring mana and regenerating mana is that restoring is independent from the regeneration ticks. Unlike regeneration, the restore intervals can vary. Restoring mana is not reflected in the regeneration number on the mana bar.
There are several other abilities which are able to increase a unit's current mana, but these effects do not count as restoring. This means, similar to how damage flagged as HP Removal does not react on on-damage effects, these abilities fully ignore abilities which react on restoring effects, like Tether.
The following abilities are able to increase unit's current mana:
Max Mana drained per second: 5%
Max duration: 5 (
12)
Drains the mana of the target, restoring the caster. Amount of mana restored is independent from how much mana the target actually loses from the spell.
Fully restores the targeted creep's mana pool.
Mana burned: 100/175/250/325/400/475/550 (
/625)
Mana restored per burned mana: 50%
Restores mana to the caster based on how much mana the spell burned on enemies.
Whenever the caster gets mana restored or regenerates mana, the target ally gets restored by 120%/130%/140%/150% of that amount.
Mana restored: 75/150/225/300 ( 375/450/525/600)
Affects the target ally.
Current health as mana restored: 55%/70%/85%/100%
Restores the caster's mana based on the target's current health.
Restored amount: Max mana
Fully restores the infested creep's mana pool upon taking control.
Restored amount per second: 20/40/60/120
Max duration: 5
Drains the mana of the target, restoring the caster. Amount of mana restored depends on how much mana the target actually loses from the spell.
Max mana drained per jump: 11%/14%/17%/20% ( 31%/34%/37%/40%)
Max jumps: 3/4/5/6
Steals a percentage of each hit target's max mana, then transfers all stolen mana to the caster once fully returned.
Mana restored per returned intelligence: 12
Intelligence regained through Arcane Orb increases current and max mana. This only goes for the affected targets upon gaining their intelligence back. Does not count as restoring.
Proc Chance: 40% ( 55%)
Max mana restored: 10%/15%/20%/25%
Has a chance to proc on any ally who casts a spell. Does not count as restoring.
Fully restores the caster ( and the target ally) to full mana if successfully reborn. Does not count as mana restoring.
Mana restored: 140
Restores the caster's mana only when successfully hitting a rune. Amount of mana restored is independent from actual mana spent for the cast.
Mana restored per second: 150/225/300
Max Duration: 10
Drains the health of the target, restoring the caster's mana if they are at full health. Amount of mana restored depends on how much damage the target actually takes from the spell. When cast on allies, drains the caster's health into the ally, restoring their mana if their health is full.
Sets the caster's ( the target ally's) mana back to what it was 5 seconds ago. Does not count as mana restoring.
Mana restored: 135
Affects all allies within range upon cast.
Mana restored: 1500
Affects the caster.
Mana restored: 125
Affects the caster.
Mana restored: 160
Affects all allies within range upon cast.
Mana restored per charge: 15
Max charges: 10
Affects the caster.
Mana restored per charge: 15
Max charges: 20
Affects the caster.
Mana restored: 150
Affects the caster. If the added mana would exceed the user's current mana pool, its maximum mana pool is temporarily increased by the exceeding amount. At the end of the duration, the user loses any of the unused mana and its maximum mana pool goes back to normal if it was exceeded.
Current mana reducing abilities[edit]
Most active and some passive abilities need mana in order to be used. This includes item abilities. The mana cost of such are displayed at the bottom left corner of the ability icon in the HUD, and once more inside the ability description in the bottom left corner. Most abilities have a fixed amount of mana cost, but some are dynamic (e.g. based on mana pool, or costing mana over time).
Besides using mana, there are many abilities capable of reducing mana, referred to as burning if it causes damage based off mana removed, draining if the mana is stolen and given to the caster or removed if the mana is simply reduced.
The following abilities reduce a unit's current mana:
Mana burned: 28/40/52/64
Mana burned as damage: 50%- Max mana drained per second: 5%
Max duration: 5 ( 12) 
Mana removed: 50/100/150/200
Each cog can only hit one unit. Also damages hit enemies. The damage is independent from the mana loss.- Mana burned: 100/175/250/325/400/475/550 ( /625)
Mana burned as damage: 60% - Io - Overcharge
Current mana removed per second: 6%
Removes the caster's mana until toggled off. 
Max mana removed per 100 moved distance: 5%
Duration: 4/5/6/7
The target loses mana as it moves.- Mana drained per second: 20/40/60/120
Max duration: 5 - Max mana drained per jump: 11%/14%/17%/20% ( 31%/34%/37%/40%)
Max jumps: 3/4/5/6 
Mana removed per damage taken: 0.63/0.53/0.45/0.4
Blocks 60% of incoming damage on the caster, draining mana instead.
Mana burned (hero): 25
Mana burned (illusion): 10
Mana burned as damage: 80%
Mana burned: 30/40/50
Mana burned as damage: 50%
Mana burned per intelligence: 3.5/4/4.5/5
Mana burned as damage: 100%
Burns the target's mana based on its intelligence.- Mana removed per stolen intelligence: 12
Hit enemies first lose mana and then get their intelligence stolen. Bypasses mana loss manipulations. 
Max mana removed: 40%
Applies damage first and then the mana loss. Bypasses mana loss manipulations.
Mana burned: 100
Mana burned as damage: 100%- Sets the caster's ( the target ally's) mana back to what it was 5 seconds ago. Bypasses mana loss manipulations.
Mana burned (hero): 20
Mana burned (illusion): 10
Mana burned as damage: 80%
Mana burned (hero): 50
Mana burned (melee illusion): 16
Mana burned (ranged illusion): 8
Mana burned as damage: 80%- Mana removed: 150
All unused remaining mana gained from Sacrifice gets removed as it expires. Bypasses mana loss manipulations.
Maximum mana affecting abilities[edit]
Besides intelligence and raw bonuses from items, there are only very few abilities which can alter a unit's maximum mana.
This list does not include intelligence affecting sources.
- Max mana bonus: 75/150/225/300 ( 375/450/525/600)
Duration: 15
The target's current mana stays the same, means its current mana percentage does not stay the same. - Max mana bonus: 125/200/275/350
Passively increases mana pool of the hero. - Max mana bonus: 150
If the added mana would exceed the user's current mana pool, its maximum mana pool is temporarily increased by the exceeding amount.
Mana granting items[edit]
Many items grant their owners a mana bonus, increasing their maximum mana when equipped, either by increasing their intelligence, or by just giving them a flat bonus. In either case, the current mana percentage stays the same.
The following items increase a unit's maximum mana pool. The affects are limited to the item's owner, which must have the item equipped.
| Item | Value | Item cost | Cost per value point |
|---|---|---|---|
| Aeon Disk | 250 | 3350 | 13.4 |
| Aether Lens | 450 | 2350 | 5.22 |
| Aghanim's Scepter | 295 | 4200 | 14.24 |
| Arcane Boots | 250 | 1400 | 5.6 |
| Blade Mail | 120 | 2200 | 18.33 |
| Bloodstone | 425 | 4900 | 11.53 |
| Bloodthorn | 300 | 7205 | 24.02 |
| Bracer | 36 | 465 | 12.92 |
| Buckler | 24 | 800 | 33.33 |
| Circlet | 24 | 165 | 6.88 |
| Crimson Guard | 24 | 3550 | 147.92 |
| Dagon 1 | 216 | 2715 | 12.57 |
| Dagon 2 | 252 | 3965 | 15.73 |
| Dagon 3 | 288 | 5215 | 18.11 |
| Dagon 4 | 324 | 6465 | 19.95 |
| Dagon 5 | 360 | 7715 | 21.43 |
| Diffusal Blade | 120 | 3150 | 26.25 |
| Drum of Endurance | 72 | 1615 | 22.43 |
| Echo Sabre | 120 | 2650 | 22.08 |
| Energy Booster | 250 | 900 | 3.6 |
| Ethereal Blade | 120 | 4700 | 39.17 |
| Eul's Scepter of Divinity | 120 | 2750 | 22.92 |
| Eye of Skadi | 550 | 5500 | 10 |
| Force Staff | 120 | 2250 | 18.75 |
| Ghost Scepter | 60 | 1500 | 25 |
| Guardian Greaves | 310 | 5450 | 17.58 |
| Headdress | 24 | 650 | 27.08 |
| Helm of the Dominator | 24 | 2000 | 83.33 |
| Hurricane Pike | 156 | 4615 | 29.58 |
| Iron Branch | 12 | 50 | 4.17 |
| Kaya | 192 | 1950 | 10.16 |
| Linken's Sphere | 156 | 5050 | 32.37 |
| Lotus Orb | 250 | 4000 | 16 |
| Magic Wand | 36 | 450 | 12.5 |
| Manta Style | 120 | 4800 | 40 |
| Mantle of Intelligence | 36 | 135 | 3.75 |
| Mekansm | 60 | 2350 | 39.17 |
| Meteor Hammer | 144 | 2625 | 18.23 |
| Mystic Staff | 300 | 2700 | 9 |
| Null Talisman | 84 | 465 | 5.54 |
| Oblivion Staff | 120 | 1650 | 13.75 |
| Octarine Core | 725 | 5900 | 8.14 |
| Orchid Malevolence | 300 | 4075 | 13.58 |
| Point Booster | 175 | 1200 | 6.86 |
| Power Treads (Intelligence) | 120 | 1450 | 12.08 |
| Ring of Aquila | 36 | 965 | 26.81 |
| Robe of the Magi | 72 | 450 | 6.25 |
| Rod of Atos | 240 | 2930 | 12.21 |
| Scythe of Vyse | 420 | 5700 | 13.57 |
| Shiva's Guard | 360 | 4750 | 13.19 |
| Silver Edge | 180 | 5550 | 30.83 |
| Soul Booster | 425 | 3200 | 7.53 |
| Spirit Vessel | 24 | 2975 | 123.96 |
| Staff of Wizardry | 120 | 1000 | 8.33 |
| Ultimate Orb | 120 | 2150 | 17.92 |
| Urn of Shadows | 24 | 875 | 36.46 |
| Veil of Discord | 168 | 2330 | 13.87 |
| Vladmir's Offering | 24 | 2250 | 93.75 |
| Wraith Band | 36 | 465 | 12.92 |
| Values may include portions from actives or auras. | |||
Mana restore manipulation[edit]
Similar to how incoming damage can be manipulated (reduced, amplified or negated), mana restoring effects can also be manipulated.
The following abilities are able to manipulate mana restoring effects
Mana restore amplification: 75%
Duration: 0.5
Amplifies all mana restoring and mana regeneration effects the caster receives.- Life Drain mana restore amplification: 0 ( 25%)
Max Duration: 10
The talent amplifies the heal done by Life Drain, and therefore also the mana restoring when at full health.
Mana loss manipulation[edit]
Several abilities are able to reduce the amount of mana a unit loses. This includes the mana cost of abilities, and mana lost, burned or drained by abilities.
It does not affect mana changes caused by losing or gaining intelligence. Current mana percentages are kept equal upon gaining or losing intelligence, regardless of mana loss reductions. It also has no effect on effects which set a unit's mana to certain values, like Time Lapse.
Mana loss reduction is applied as very last, after the spell causing it fully resolved. This means when a spell has extra effects based on the mana loss, these extra effects are not affected by mana loss reduction. For example, Mana Break abilities deal full damage, despite burning less mana. Mana draining effects still restore the same amount, despite their targets losing less mana.
Mana loss reduction: 0% ( 14%)
Requires talent. Affects all allies globally.
Mana loss reduction: 30%
Duration: 50
Mana loss reduction: 10%
Passive item bonus.
Mana regeneration[edit]
Mana Regeneration determines the amount of mana a unit regains each second. It is shown as a small number with a + sign at the right side of the unit's mana bar.
Version history[edit]
- Rebalanced attribute bonuses. Primary attributes now provide +25% more benefit to the bonuses it provides.
- Mana per intelligence rescaled from 12 [?] to 12 [?].
- Mana regen amp per intelligence rescaled from 2% [?] to 1.8% [?].
- Increased mana per intelligence from 11 to 12.
- Reworked mana regeneration formula to change percentage bonuses to raw bonuses.
- Old: (0.01 + 0.04 * Int) * (1 + Percentages Bonuses) + Flat Bonuses
- New: (Base + Flat Bonuses) and increases by 2% Per Intelligence
- Each point of Intelligence amplifies mana regeneration by 2%.
- All heroes currently have 0.9 base, but may be adjusted on case by case basis in the future (like base HP regen is now).
- Talents, abilities and items have been adjusted to account for the new formula.
- Increased hero base mana pool from 50 to 75
- Reduced mana per intelligence from 12 to 11.
- Increased hero base mana pool from 0 to 50.
- Reduced mana per intelligence from 13 to 12.
- Heroes now respawn with full mana.
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