Leech

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Revision as of 03:07, 1 January 2017 by >Illviljan (Recovered leech duration and sources. Quite important information in there for those that wants to do the calculations themselves.)
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"Life Leech" redirects here. For the support gem, see Life Leech Support. For the passive skill, see Life Leech (passive skill).
"Mana Leech" redirects here. For the support gem, see Mana Leech Support.

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Please help improve this page if you can.

Leech recovers an amount of life, mana or energy shield over time, relative to the damage inflicted on an enemy. Leech cares about the damage taken by the enemy, not the amount of life removed.[1][2]

Mechanics

All leech mechanics act the same way for life, mana, or in the case of Ghost Reaver, energy shield. Examples in this article will use life, but if the character has equal statistics for a different resource (life or energy shield), they will apply in the same way.

Whenever a character hits an enemy while having an applicable source of leech, a leech instance is created on that character. Each leech instance is independent, and will heal the character for Damage Dealt #% damage leeched as life at a default rate of 2% of that character's maximum health per second. Thus, each leech instance will have a different duration, calculated as (HealAmount / (MaximumHealthPool * 0.02) ). Each leech instance will stack and apply to the character simultaneously until it expires or the character is at full life. However, if the total leech per second from all leech instances is greater than the character's leech cap, the extra healing will be ignored.[3] By default, this cap is Expression error: Unrecognized punctuation character "[".% of that character's maximum life pool. This is covered in greater detail under the Combined Recovery Rate section.

Modifiers

Leech can be modified significantly through passives, support gems, and equipment. Beyond just adding various sources of leech, modifiers such as #% of maximum Life per second to maximum Life Leech rate or #% increased (or reduced) Life Leeched per second can change how leech is applied to a character.

The #% increased (or reduced) Life Leeched per second modifier provides an increase to how much life per second a character will regain from each leech instance, without changing the duration of the leech instance. This will increase the total amount healed by that leech instance. If previously a leech instance would heal your character for 100 health over 1 second, and you gain 20% increased life leeched per second, it will now heal your character for 120 health over 1 second.

The #% of maximum Life per second to maximum Life Leech rate modifier raises a character's leech cap, calculated as (Maximum Life * (0.20 + #% of maximum Life per second to maximum Life Leech rate) ). Normally a character with 5,000 life can only leech health at a maximum rate of 1,000 per second (5000 * 0.20 = 1000) regardless of how many leech instances they have and what rate they individually regain life. If that character gains 5% of maximum Life per second to maximum Life Leech rate, such as from the notable Vitality Void, they will be able to leech up to 1,250 life per second. (5000 * (0.20 + 0.05) = 1250)

There are a few notable ways for these factors to be altered besides the passive tree:[4]

  • The of Smothering modifier for maps slows life and mana leech recovery rate by 50%.
  • For life leech by a skill supported by the Module Error: No skills found with q_where = skill.active_skill_name="Life Leech" gem.
  • Vorici's master modifier provides #% increased Life Leeched per second.

Leech duration

The leech recovery duration is how long in seconds a leech instance has to last to recover the entirety of the damage leeched.[5] It can be found by dividing the percent damage inflicted that is leeched by the leech recovery rate.

duration = damage dealt * % damage leeched / (max health * 0.02)

No modifiers to leech rate affects the duration.[5] Note that the leeched damage is always rounded down to nearest integer, which can be noticeable for skills that do low amounts of damage quickly.

Combined Recovery Rate

The total leech recovery rate (accounting for all instances of leech) can be calculated by

total leech recovery rate = max life * 0.02 * instances of leech * (1 + increased leech per second)

where max life can also be the character's maximum mana for mana leech. Increased leech per second is the sum of all the #% increased (or reduced) Life/Mana Leeched per second modifiers.

This combined rate is subject to the leech cap, which is by default Expression error: Unrecognized punctuation character "[".% of the character's maximum health. This maximum is increased by any #% of maximum Life/Mana per second to maximum Life/Mana Leech rate modifiers.

As such, each character only requires a certain number of leech instances before they will be recovering at their maximum rate. For a default character, this is 10 instances, but any increases or decreases from #% Life Leeched per second or #% of maximum Life per second to maximum Life Leech rate will change this number.[3] If a character has too many leech instances, the extra healing will be ignored. This maximum can be found with the below formula:

max instances = (0.2 + increased max leech rate) / (0.02 * (1 + increased leech per second))
Derivation of max instances ▾ [Expand] ▾

Find the amount of instances that gives the maximum leech recovery rate:

max recovery rate = recovery rate
max life * instances * 0.02 * (1 + increased leech per second) = max instances * (0.2 + increased max leech rate)

setting max instances to instances and solving yields the total amount of active leech instances allowed

max instances = instances = (0.2 + increased max leech rate) / (0.02 * (1 + increased leech per second))

Immunity to leech

Players can become immune to being life/mana leeched from by enemies through allocating the Bloodless notable passive skill or by equipping the following unique items:

Cannot leech

The following unique items prevent the user from leeching life and/or mana.

  • DeidbellDeidbell
    Gilded Sallet    Armour: (290-397)
    Evasion: (90-97)    Requires Level 33, 38 Str, 38 Dex+(20-30) to Strength
    +(20-30) to Dexterity
    Skills which Exert an Attack have (20-40)% chance to not count that Attack
    +(200-300) to Armour
    Cannot Leech when on Low Life    May you never hear it toll.     (when on low life)
  • DeidbellowDeidbellow
    Gilded Sallet    Armour: (290-397)
    Evasion: (90-97)    Requires Level 33, 38 Str, 38 Dex+(20-30) to Strength
    +(20-30) to Dexterity
    Adds 10 to 20 Physical Damage to Attacks
    +(200-300) to Armour
    20% increased Melee Damage
    Cannot Leech when on Low Life
    If you've Warcried Recently, you and nearby allies have 20% increased Attack, Cast and Movement Speed    May it echo through the halls.     (when on low life)
  • InfractemInfractem
    Decimation Bow    Bow
    Physical Damage: (117.3-142.2) to (258.4-289.8)
    Critical Strike Chance: (6.50-7.50)%
    Attacks per Second: 1.20    Requires Level 53, 170 Dex(30-50)% increased Critical Strike Chance+(20-30) to Dexterity
    (70-80)% increased Physical Damage
    Adds (25-35) to (36-45) Physical Damage
    10% increased Movement Speed
    +(350-400) to Accuracy Rating
    Cannot Leech Life
    Arrows Pierce all Targets    Mark us with mercy, then press on with care,
    Execute us steadily, notch away at our despair.
  • Kondo's PrideKondo's Pride
    Ezomyte Blade    Two Hand Sword
    Physical Damage: (198.4-217) to (368-402.5)
    Critical Strike Chance: 6.50%
    Attacks per Second: 1.40
    Weapon Range: 1.3 metres    Requires Level 61, 113 Str, 113 Dex+25% to Global Critical Strike Multiplier(220-250)% increased Physical Damage
    0.6% of Physical Attack Damage Leeched as Life
    50% increased Melee Damage against Bleeding Enemies
    Cannot Leech Life from Critical Strikes
    30% chance to Blind Enemies on Critical Strike
    50% chance to cause Bleeding on Critical Strike    Faintly gleaming in the moonlit night,
    Kondo's Pride was primed to fight.
    Driven by an inner fire,
    bloodlust, spite and ill desire.
    He swiftly moved to strike them all,
    wreaking havoc like a steel squall.     (from critical strikes)
  • MindspiralMindspiral
    Aventail Helmet    Armour: (101-119)
    Energy Shield: (21-25)    Requires Level 37, 42 Str, 42 Int+(100-120) to maximum Mana
    Gain (10-15)% of Maximum Mana as Extra Maximum Energy Shield
    Enemies Cannot Leech Mana From you
    (10-20)% of Damage taken Recouped as Mana
    Cannot Leech Mana    Where top is bottom and weak is strong.

Types of leech

There are several types of leech that specialize on certain types of skills. Some leech types only work for attacks, others only works with elemental damage or all sources of physical damage. If there is specialization it will be defined in the modifier.

Generally the leech modifiers follow this template:

#% of X Y Damage Z Leeched as Life/Mana

Where X can be:

  • Physical/Fire/Cold/Lightning/Elemental/Chaos

Y can be:

  • Attack/Spell

and Z can be:

Note that if X, Y or Z are not specified it means that it applies to all those types.

Examples

  • Module Error: No skills found with q_where = skill.active_skill_name="Life Leech" and Module Error: No skills found with q_where = skill.active_skill_name="Mana Leech" has the mod #% of Damage Leeched as Life/Mana implying it works for all types of skills that hit a target.
  • Module Error: Too many skills found with q_where = skill.active_skill_name="Warlord's Mark". Please choose only one of the following ids:
    MonsterWarlordsMark - Base duration is 4.00 seconds, Cursed enemies grant 2% Life Leech when Hit by Attacks, Cursed enemies grant 2% Mana Leech when Hit by Attacks, Cursed enemies have a 100% chance to grant an Endurance Charge when slain, Hits against Cursed Enemies have 40% chance to double Stun Duration (page)
    ArchnemesisWarlordsMark - Base duration is 4.00 seconds, Cursed enemies grant 2% Life Leech when Hit by Attacks, Cursed enemies grant 2% Mana Leech when Hit by Attacks, Cursed enemies have a 100% chance to grant an Endurance Charge when slain, Hits against Cursed Enemies have 40% chance to double Stun Duration (page)     also has the mod #% of Damage Leeched as Life/Mana, granted the enemy already is cursed.
  • The notable passive Soul Raker grants the mod #% of Physical Damage Dealt with Claws Leeched as Life specifying it works for only Physical damage dealt by a Claw, this implies that this passive only works for Attacks because Spells are separate from the weapon.
  • The notable passive Lust for Carnage grants the mod #% of Physical Attack Damage Leeched as Life specifying it applies to Physical Attacks. All types of weapons can make use of this notable, however not Spells.

Skill gems

{{#ask: 

Concept:Skill gems
|~mana_leech*
|?Has name
|?Has infobox HTML
|?Has support gem letter HTML
|?Has level requirement
|?Has strength percentage
|?Has intelligence percentage
|?Has dexterity percentage
|intro=A list of skill gems that are relevant to leech.
|limit=1000
|link=none
|format=template
|introtemplate=SMW item table/skill gem/intro
|template=SMW item table/skill gem
|outrotemplate=SMW item table/skill gem/outro
|named args=yes
|userparam=level=yes, int=yes, dex=yes, str=yes
|sort=Has primary attribute, Has name

}}

Passive skills

There are passive skills that grant passive leech or bonuses to leech.

Attack Damage Leeched as Life

These passive skills grant passive life leech when dealing any damage with a weapon. Template:Passive table

Template:Ascendancy passive table

Physical Attack Damage Leeched as Life

These passive skills grant passive life leech when dealing physical damage with a weapon. Template:Passive table

Increased Life Leeched per second

These passive skills increase the rate of life gained while leeching. Template:Passive table

Template:Ascendancy passive table

Increase to Maximum Life Leech rate

These passive skills increase the maximum life leech rate. Template:Passive table

Template:Ascendancy passive table

Minion Life Leech

These passive skills grant life leech for minions. Template:Passive table

Modifiers

These keystone passives change the way Life Leech works, but do not directly enhance Life Leech. These effects do not apply to Mana Leech.

The Vaal Pact Keystone will allow life leech to apply immediately at the cost of losing life regeneration. Ghost Reaver applies life leech to energy shield instead of life. Endless Hunger causes Life Leech effects to not get removed when the user reaches full life. Template:Passive table

Template:Ascendancy passive table

Attack Damage Leeched as Mana

These passive skills grant passive mana leech when dealing any damage with a weapon. Template:Passive table

Physical Attack Damage Leeched as Mana

These passive skills grant passive mana leech when dealing physical damage with a weapon. Template:Passive table

Increased Mana Leeched per second

These passive skills increase the rate of mana gained while leeching. Template:Passive table

Increase to Maximum Mana Leech rate

These passive skills increase the maximum mana leech rate. Template:Passive table

Non-Attack Damage Leech

These items and skills grant leech from damage sources besides attacks.

Items

  • All damage:
    • Berek's GripBerek's Grip
      Two-Stone Ring      Requires Level 20+(12-16)% to Cold and Lightning Resistances(25-30)% increased Cold Damage
      Adds 1 to (50-70) Lightning Damage to Spells and Attacks
      +(30-40) to maximum Life
      1% of Damage Leeched as Life against Shocked Enemies
      1% of Damage Leeched as Energy Shield against Frozen Enemies      "Berek hid from Storm's lightning wrath
      In the embrace of oblivious Frost
      Repelled by ice, blinded by blizzards
      Storm raged in vain
      While Berek slept."
      - Berek and the Untamed       (against frozen/shocked enemies)
    • The HarvestThe Harvest
      Jasper Chopper      Two Handed Axe
      Physical Damage: (127.6-139.2) to (200.2-218.4)
      Critical Strike Chance: 5.00%
      Attacks per Second: 1.15
      Weapon Range: 1.3 metres      Requires Level 37, 100 Str, 29 Dex(120-140)% increased Physical Damage
      1.2% of Damage Leeched as Life on Critical Strike
      3% increased Global Critical Strike Chance per Level
      Gain a Flask Charge when you deal a Critical Strike      Let it grow and gather inside them,
      Let it flow through their veins.
      Don't waste a drop.       (on critical strike)
    • Module Error: No skills found with q_where = skill.active_skill_name="Life Leech"
    • Module Error: No skills found with q_where = skill.active_skill_name="Mana Leech"
    • Thirst for HorrorsThirst for Horrors
      War Buckler      Chance to Block: 31%
      Evasion: (219-291)
      Energy Shield: (50-70)
      Movement Speed: -3%      Requires Level 29, 74 Dex9% increased Movement Speed+3 to Level of Socketed Curse Gems
      (30-50)% increased Evasion Rating
      +(50-70) to maximum Energy Shield
      +(40-50) to maximum Life
      +5% Chance to Block
      100% Chance to Cause Monster to Flee on Block
      1% of Damage Leeched as Life against Cursed Enemies
      Curse Skills have 100% increased Skill Effect Duration      What goes out must come in.       (against cursed enemies)
    • Trolltimber SpireTrolltimber Spire
      Cedar Tower Shield      Chance to Block: 25%
      Armour: (216-282)
      Movement Speed: -3%      Requires Level 17, 47 Str+(20-30) to maximum Life(130-150)% increased Armour
      +(40-60) to maximum Life
      You and your Totems Regenerate 0.5% of Life per second for each Summoned Totem
      15% increased Area of Effect for Skills used by Totems
      0.5% of Damage dealt by your Totems is Leeched to you as Life      The problem with working fresh trolltimber:
      by the time you've carved out one end,
      the other has sprouted fresh roots!       (to totems only)
    • Valako's SignValako's Sign
      Topaz Ring      Requires Level 38+(20-30)% to Lightning Resistance40% increased Damage with Hits against Shocked Enemies
      20% increased Lightning Damage
      +(20-40) to maximum Mana
      1% of Damage Leeched as Life against Shocked Enemies
      25% chance to Shock      A gift from Valako,
      appointing Kiloava as the Herald of War.
      A title Kaom claimed when he ended Kiloava's bloodline.       (against shocked enemies)
    • Module Error: Too many skills found with q_where = skill.active_skill_name="Warlord's Mark". Please choose only one of the following ids:
      MonsterWarlordsMark - Base duration is 4.00 seconds, Cursed enemies grant 2% Life Leech when Hit by Attacks, Cursed enemies grant 2% Mana Leech when Hit by Attacks, Cursed enemies have a 100% chance to grant an Endurance Charge when slain, Hits against Cursed Enemies have 40% chance to double Stun Duration (page)
      ArchnemesisWarlordsMark - Base duration is 4.00 seconds, Cursed enemies grant 2% Life Leech when Hit by Attacks, Cursed enemies grant 2% Mana Leech when Hit by Attacks, Cursed enemies have a 100% chance to grant an Endurance Charge when slain, Hits against Cursed Enemies have 40% chance to double Stun Duration (page)
  • Physical damage:
  • Fire damage:
  • Cold damage:
  • Lightning damage:
  • Elemental damage:
  • Chaos damage:
    • Atziri's PromiseAtziri's Promise
      Amethyst Flask      Lasts 6.50 Seconds
      Consumes 35 of 65 Charges on use
      +35% to Chaos Resistance      Requires Level 68Gain (5-8)% of Elemental Damage as Extra Chaos Damage during effect
      2% of Chaos Damage Leeched as Life during Effect
      Gain (5-8)% of Physical Damage as Extra Chaos Damage during effect      "Death needs not your understanding. It needs only your loyalty."
      - Atziri, Queen of the Vaal      Right click to drink. Can only hold charges while in belt. Refills as you kill monsters.
    • Broken FaithBroken Faith
      Archon Kite Shield      Chance to Block: 12%
      Armour: (156-179)
      Energy Shield: (32-37)
      Movement Speed: -3%      Requires Level 68, 85 Str, 85 Int+12% to all Elemental Resistances0.4% of Chaos Damage Leeched as Life
      -10% Chance to Block
      100% increased Global Armour while you have no Energy Shield
      You have Unholy Might while you have no Energy Shield
      Create Profane Ground instead of Consecrated Ground      Be not blinded by the light.
    • Hungry AbyssHungry Abyss
      Viridian Jewel      Limited to: 1With 5 Corrupted Items Equipped: Life Leech recovers based on your Chaos Damage insteadCorruptedDarkness can never be sated.Place into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket.       (override)
    • Innsbury EdgeInnsbury Edge
      Elder Sword      One Handed Sword
      Physical Damage: (72-86.4) to (132-158.4)
      Critical Strike Chance: 5.00%
      Attacks per Second: (1.52-1.62)
      Weapon Range: 1.1 metres      Requires Level 47, 81 Str, 81 Dex+330 to Accuracy Rating(100-140)% increased Physical Damage
      (17-25)% increased Attack Speed
      0.2% of Chaos Damage Leeched as Life
      25% of Physical Damage Converted to Chaos Damage
      Attacks with this Weapon Maim on hit      A sword he brought, his foes to maim and rend,
      from places dark behind forbidden doors,
      but night by night he woke with frighten'd roars
      from ghoulish dreams, too strange to comprehend.

Enchantments

These boot enchantments grant leech if you've Killed Recently. {{#ask: 

 Has mod generation type::10
 Has stat text::~*Damage*Leeched*
 |format=ul

}}

Ascendancy passive skills

Template:Ascendancy passive table

Related effects

These effects grants bonuses based on Leech:

Items

  • Atziri's AcuityAtziri's Acuity
    Vaal Gauntlets    Armour: (696-851)Requires Level 63, 100 Str+(60-80) to Intelligence
    (40-60)% increased Global Critical Strike Chance
    (200-220)% increased Armour
    +(60-75) to maximum Life
    You have Vaal Pact if you've dealt a Critical Strike Recently    "The heart is the herald.
    It will tell me when it is best to strike."
    - Atziri, Queen of the Vaal
  • BloodseekerBloodseeker
    Hellion's Paw    Claw
    Physical Damage: (162-172.8) to (255-272)
    Critical Strike Chance: 6.00%
    Attacks per Second: 1.68
    Weapon Range: 1.1 metres    Requires Level 62, 131 Dex, 95 Int1.6% of Physical Attack Damage Leeched as Life(200-220)% increased Physical Damage
    Adds 25 to 30 Physical Damage
    5% increased Attack Speed
    1.2% of Physical Attack Damage Leeched as Life
    5% increased Movement Speed
    Life Leech from Hits with this Weapon is instant    "For the life of the flesh will always be in the blood."
    - Atalui, Vaal Priestess
  • Cherrubim's MaleficenceCherrubim's Maleficence
    Triumphant Lamellar    Armour: (988-1311)
    Evasion: (1240-1647)
    Movement Speed: -3%    Requires Level 69, 95 Str, 116 Dex(50-80)% increased Chaos Damage
    (160-200)% increased Armour and Evasion
    +(70-100) to maximum Life
    100% increased total Recovery per second from Life Leech    "The Consort of Chaos descended,
    swiftly, brutally, artfully, she consumed the living,
    leaving naught behind but a Rosemarie bloom,
    to celebrate the massacre."
    - Blass, explorer, hunter, adventurer
  • The RetchThe Retch
    Rustic Sash    Requires Level 44(12-24)% increased Global Physical Damage+(60-80) to maximum Life
    +(30-40)% to Cold Resistance
    0.4% of Physical Attack Damage Leeched as Life
    60% increased Flask Effect Duration
    30% reduced Flask Charges gained during any Flask Effect
    200% of Life Leech applies to Enemies as Chaos Damage
    15% increased Movement Speed during any Flask Effect    But the grain grew twisted and the water turned dark
    and those who partook of Mother Gull's gift
    birthed monsters that fed
    on the flesh of one another.
  • Warped TimepieceWarped Timepiece
    Turquoise Amulet    Requires Level 50+(16-24) to Dexterity and Intelligence(10-25)% increased Attack Speed
    (10-25)% increased Cast Speed
    (10-15)% increased Movement Speed
    (20-10)% reduced Skill Effect Duration
    Debuffs on you expire 100% faster    As you have lived, so you shall die
    forever trying to keep up with me.
    Your blood on these hands of mine
    forever makes me the public enemy.

Enchantments

{{#ask: 

 Has mod generation type::10
 Has mod group::SkillEnchantment
 Has stat text::~*Leech*
 |?Has stat text=-
 |format=ul

}}

Passive skills

Template:Passive table

Template:Ascendancy passive table

Version history

In The Awakening expansion the leech mechanics were changed with the goal to make it harder to leech against a single enemy. Before, Life/Mana was recovered at a constant rate, without taking into account how many enemies were hit by the skill. The leech mechanic was then changed so that a new leech instance was created per hit. These instances can stack meaning a single hit against multiple targets will grant multiple instances, as will multiple hits against a single target.[4]


Version Changes
2.0.0
  • Multiple leech effects now stack. A single hit against multiple targets grants multiple effects, as do multiple hits against a single target.
  • The speed at which you leech has been substantially reduced for both life and mana, with less of a reduction to mana leech rate, bringing it in-line with life leech rate. These now default to 2% of maximum life per second. It can be increased.
  • A maximum leech rate caps the rate at which you can leech. It's set to 20% of maximum life or mana per second.
  • Methods of improving leech, leech rate and increasing your maximum leech rate have been added to new clusters in the passive skill tree, primarily in the regions between the Marauder, Duelist and Ranger.
  • Some of the already existing clusters in this region that specialized in specific weapon types have also had leech elements added to them.
  • All existing values of leech have been substantially reduced, including values on existing items.
  • Some things such as Support Gems and Warlord's Mark have had their values brought in line with the other leech changes.
  • Previously, we had modifiers for "increased (or reduced) Life/Mana Leech rate". These did two things: They increased the amount of Life/Mana you're gaining per second for each leech effect and they reduced the duration of each leech effect, such that the total life/mana gained over the duration remained the same. All such modifiers have now been changed to "increased (or reduced) Life/Mana Leeched per second". This still increases the value of Life/Mana you're gaining per second for each leech effect, exactly as it did before. It no longer affects duration of the leech effects, meaning you'll gain more total life/mana from each one as a result.

References

  1. ↑ GGG_Mark (August 6, 2013). "Evasion and Damage Reflection questions". Path of Exile forum. Retrieved November 17, 2015.
  2. ↑ GGG_Mark (July 1, 2013). "Explosive Arrow". Path of Exile forum. Retrieved September 27, 2016.
  3. ↑ 3.0 3.1 GGG_Mark (June 20, 2015). "Vitality Void: Leech Cluster Thread". Path of Exile subreddit. Retrieved July 20, 2015.
  4. ↑ 4.0 4.1 GGG_Neon (May 18, 2015). "Upcoming changes to Leech Thread". Path of Exile Forum. Retrieved July 20, 2015.
  5. ↑ 5.0 5.1 GGG_Mark (October 1, 2015). "Life leech (wiki)". Path of Exile forum. Retrieved October 12, 2015.
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