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Skill Trees

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A Skill Tree is a kind of a categorized spellbook where players can see what skills are available to their character.

Overview[]

Skills in Diablo II and Diablo III, unlike the first game, are tied to certain categories. A skill can only be used when learned (equipped or invested skill points into), and the total number of skills character may have at a time is limited (unlike the first game, where one could, in theory, learn all spells that exist in the game world).

There are many ways to categorize skills, such as by Elemental Damage type, by being tied to certain game mechanics, etc. They can be divided by the degree of action required to use them:

  • Active: most numerous skill category; to get an effect, the skill must be activated manually, usually one cast per trigger.
    • Channeled: must not only be activated, but also maintained for the entire duration, most other actions (especially movement) being unavailable while doing so. Usually the skill is maintained by holding the cast button continuously.
    • Summon: creates a minion, pet, construct or any other independent entity which will fight on player's behalf. Most summoned creatures disappear if their master dies, and may be killed by enemy attacks.
  • Passive: do not need to be activated; once selected or learned, will always provide their benefit. The bonus may either be permanent, or trigger at certain point (such as Life falling beneath a certain threshold).
  • Active / Passive: these skills combine traits of both active and passive.
    • Auras, Laws, Mantras and other similar traits often have a passive effect, but can be activated manually to receive an extra temporary bonus, usually once in a while.
    • Buffs are applied manually, but once cast, provide only passive benefits to the player, and do not need to be cast in combat (except for refreshing their duration, which is usually long enough to survive all but longest battles without recasting it). Most Buffs are lost upon death.

Diablo II[]

ShapeShiftingSkills

The Druid's Shape Shifting skill tree

In Diablo II, it has three tabs at the right side. Clicking on the tab will take player to the corresponding skill tree.

The tree consists of rows of skills. The row indicates the level requirement to acquire the skill. The first (top) row of skills are available as soon as the character is created. The second row has a level requirement of 6, with each following row's level requirement increasing by 6, up to 30 for the bottom row.

Some skills have one or more arrows pointing to them. Any skill on the tree that points to another skill is a prerequisite. For example, in the image to the right, Fire Claws FireClaws has arrows pointing to it from Feral Rage FeralRage and Maul MaulSkill. This means that in order to get Fire Claws, one must already have at least one skill point in both Feral Rage and Maul.

Skills synergize with each other, passively enhancing other skills, usually in the same tree.

Assassin Skills
Martial Arts
Shadow Disciplines
Traps
Necromancer Skills
Summoning Spells
Poison and Bone Spells
Curses


Development[]

The idea for skill trees in Diablo II came from David Brevik; according to Brevik himself, the idea came to him while he was in the shower. He likened the idea to the tech trees of Civilization II.[1]

Diablo III[]

Development[]

Tome This page contains obsolete content
This article contains information that is no longer relevant to gameplay.
D3SkillsWindow

Original design of the skill trees

In the early versions of Diablo III, skill trees were working in the same way they did in Diablo II: three separate trees, unlocking more passive and active skills as players invest more skill points in them (also similar to World of Warcraft pre-MoP design). However, eventually this concept has been canceled, although most of the skills were more or less transferred to the new system of skill categories (see below). This allowed making mixed builds and prevented players from wasting points on skills they do not want just to get to the next skill in the category. However, details about two older skill trees (Barbarian and Wizard) still exist:

Diablo III Pre-release Barbarian Skills

Berserker Skills — Frenzy • Threatening Shout • Onslaught • Double Strike • Strong Constitution • Berserker State • Leap Attack • Enrage • Dual Wield Specialization • Savage • Speed Boost • Whirlwind • Slashing Strike • Relentless Attacks • Destroy Armor
Juggernaut Skills — Bash • Cleave • Ground Stomp • Focused Strength • Stubborn • Recovery • Taunt • Stunning Blows • Two-Handed Weapon Specialization • Invigorated • Seismic Slam • Revenge • Iron Will • Crushing Blows • Seismic Effect
Battlemaster Skills — Battle Rage • Perseverance • Power of the Battlemaster • Iron Skin • Hammer of the Ancients • Battle Cry • Scavenge • Critical Attacks • Shield Specialization • Furious Charge • Ignore Pain • Deliberate Defense • Improved Battle Rage • Death Proof • Inspiring Presence • Natural Resistance • Mighty Hammer

Diablo III Pre-release Wizard Skills

Storm Skills — Charged Bolt • Thunderstruck • Empowered Magic • Lightning Speed • Storm Armor • Frost Nova • Deep Freeze • Power Armor • Static Charge • Electrocute • Ray of Frost • Lethal Energy • Improved Charged Bolt • Static Residue • Blizzard • Storm Power • Epic Storms • Shattering Ice • Tornado
Arcane Skills — Magic Missile • Arcane Power • Efficient Magics • Penetrating Spells • Disintegrate • Wave of Force • Arcane Armor • Arcane Weakness • Arcane Speed • Arcane Orb • Slow Time • Arcane Distortion • Mana Recovery • Improved Magic Missile • Temporal Armor • Teleport • Greater Mana • Mana Burst • Runic Might
Conjuring Skills — Spectral Blade • Spell Speed • Weapon Mastery • Damage Resistance • Stone Skin • Mirror Image • Conjured Armor • Conjured Health • Duplicate Conjuring • Meteor Storm • Acid Cloud • Conjured Power • Conjured Duration • Improved Spectral Blade • Hydra • Magic Weapon • Magical Impact • Slowing Strikes • Armor Piercing

Current System[]

In Diablo III, skill trees were replaced with skill categories. Each class has six, and each category includes three to five skills. The system below is approximate, in fact, Demon Hunters and Witch Doctors have their categories slightly different from those of other classes. Necromancers have their categories totally different, and grouped mostly by the type of resource these skills use.

  • Primary (default LMB): basic skills that do not waste resources, or even generate them with every attack, have no cooldown, but deal less damage than other skills. Pants, Class-specific Items and Belts may enhance the damage done by these skills.
  • Secondary (default RMB): advanced skills that usually waste resources, but generally have no cooldown as well; basically, they are the main combat skills. Helms, Boots and Class-specific items may enhance the damage done by these skills.
  • Defensive (default 1): protective skills that are focused on protection or on disabling enemies (i.e. Crowd Control) rather than dealing damage. They usually cost no resources (or even generate them), but have cooldowns, and while some of them deal minor damage, their main purpose is survival. 
  • Tertiary (default 2, name of the category varies by class): powerful skills, usually they cost more resources than Secondary, and / or have cooldowns. These skills mostly deal damage, are considerably more potent than Secondary skills, but players won't be able to use them as often as they can use Secondary skills. Boots, Class-specific items, Pauldrons and Chest Armors may enhance these skills. 
  • Special (default 3, name of the category varies by class): these skills are usually semi-passive, enhancing the character and / or allies, or summoning pets and minions. Some classes can only pick one skill of this category at a time. However, these skills rarely do damage. Class-specific items, Pauldrons and Chest Armors may enhance these skills.
  • Ultimate (default 4, name of the category varies by class): these skills are usually the most powerful tools in the character's arsenal. They can be incredibly damaging, very potent Crowd Control forms, enhancing the character far beyond their usual capabilities for a short time (or even changing their physical form into a creature of legends) or summoning very numerous or very powerful minions. However, most of these skills have a very high resource cost and / or a very long cooldown. Class-specific items, Pauldrons and Chest Armors may enhance these skills.

Passive skills have a separate category. At level 10, a character has one passive skill slot, but can acquire the second one at level 20, the third one at level 30, and the final (fourth) one at level 70. Hellfire Amulet allows having five different passives at a time. Passive skills can be taken in any combination, regardless of which active skills have been chosen.

Originally, characters can only have one skill of each category, and may not change the default button. However, with the so-called Elective Mode turned on in the Options, one can take any skills in any combinations, unless specifically stated otherwise (such as Wizards only being able to use one Armor spell).

Skills can be changed or assigned new Skill Runes (counts as changing skills too) at any moment when out of combat, and when the skill in question is not on a cooldown. If performed in town, the new skill is ready instantly, otherwise it has a 10 seconds cooldown before it can be used.

Note that each item can only have one "Increases (Skill Name) Damage by X%" Primary affix.

Primary Skills
Fists of Thunder • Deadly Reach • Crippling Wave • Way of the Hundred Fists
Secondary Skills
Lashing Tail Kick • Tempest Rush • Wave of Light
Defensive Skills
Blinding Flash • Breath of Heaven • Serenity • Inner Sanctuary
Techniques
Dashing Strike • Exploding Palm • Sweeping Wind
Focus
Cyclone Strike • Seven-Sided Strike • Mystic Ally • Epiphany
Mantra
Mantra of Salvation • Mantra of Retribution • Mantra of Healing • Mantra of Conviction
Passive Skills
Resolve • Fleet Footed • Exalted Soul • Transcendence • Chant of Resonance • Seize the Initiative
The Guardian's Path • Sixth Sense • Determination • Relentless Assault • Beacon of Ytar • Alacrity
Harmony • Combination Strike • Near Death Experience • Unity • Momentum • Mythic Rhythm
Removed
Guiding Light • Mantra of Evasion • One with Everything • Pacificism • Provocation
Cut
Impenetrable Defense • Radiant Visage

Diablo IV[]

Skill Tree2-D4

The skill tree interface in Diablo IV

Skill Trees return in Diablo IV. They are considered separately from the Paragon Board.

The Skill Tree provides players with a variety of playstyles for each class through Skills, Passive Skills, Enhancements, and Key Passives as their character levels up and hones their abilities. Skill Points are earned from Leveling up and Zone Progress Rewards. Up to 5 Skill Points can be spent on each Skill to increase its rank.

The Skill Tree can be broken down as thus:

  • Nodes: Each cass has access to Basic, Core, and Ultimate Skills, as well as Key Passives and Skill types unique to that class.
  • Basic Skills: These are the first skills a player can access; they unlock at Level 2. Outside of character creation, this is one of the earliest decisions a player will make. Basic Skills typically provide additional effects such as increasing the effectiveness of other skills, providing resource generation, increasing mobility, or adding utility to the character. These skills can always be used and do not have a cooldown or resource cost to cast.
  • Core Skills: The older, stronger sibling of Basic Skills—they are unlocked at Level 4. Core Skills deal significantly more damage, require an amount of a class's resource to cast, and will often be the bread and butter of a character’s offensive combos.
  • Ultimate Skills: These skills incur a cooldown after being used. Ultimate Skills channel immense power and leave devastation in their wake.
  • Key Passives: Unlocked at Level 32, Key Passives dramatically affect how other skills operate. They provide the final tweaks to a player's playstyle.[2]

Development[]

Skill Tree-D4

The original skill tree design

Following the initial criticism of the Talents system that essentially forced the player to choosing one of the pre-determined paths (with just a few alternate selections, mostly in the end), the entire system was revamped to allow more liberty, fashioned in the form of an actual tree.

Skill Trees were originally divided between 'branches' and 'roots.'

  • Branches contained skills and skills upgrades, and used skill points. Skill points put into skills unlock new active abilities, increase their potency, and there were also upgrade nodes that provide additional effects. Each node lead to distinct options, literally branching the choices, but unlike talents, nodes were not mutually exclusive. Branches were not necessarily tied to a single skill type: i.e. skills in a branch did not lock the character to a specific play pattern (for example, a Sorceress might have different types of Elemental Damage in a single branch).
  • Roots contained powerful passive effects, using passive points. Roots were similar to the old talents (and reincorporated most of them), but were not locked into strict chains. Root nodes were general, increasing overall powers not tied to a particular skill.

Players were not able to pursue every branch on the tree. The developers intended that 30-40% of nodes could be filled in by the end game.[3]

References[]

  1. ↑ 2015-09-08, Page 2: In Their Own Words: An Oral History of Diablo II With David Brevik, Max Schaefer, and Erich Schaefer. US Gamer, accessed on 2015-09-13
  2. ↑ 2023-04-24, MAKE SANCTUARY YOURS—PLAY YOUR WAY IN DIABLO IV. Blizzard Entertainment, accessed on 2023-05-12
  3. ↑ 2020-09-29, DIABLO IV QUARTERLY UPDATE—SEPTEMBER 2020. Blizzard Entertainment, accessed on 2020-09-30
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