Resource

A Resource Pool is part of a character's ability to use Skills. It's generally gathered in various ways and expended upon using as skill, where skills have different "costs", and use a different amount of resource from the pool. Mana is the prime example of a resource pool.

Each character uses a different and unique resource in Diablo III:

• The Barbarian uses Fury.
• The Demon Hunter's uses Hatred & Discipline.
• The Monk uses Spirit.
• The Witch Doctor uses Mana.
• The Wizard uses Arcane Power.

Diablo Games

In Diablo I and Diablo II all classes used Mana as their one main resource, but in Diablo III every class has its own unique resource. In all the Diablo Games so far, the resource pool is located in the UI, on the bottom right hand side, usually in an orb or sphere.

Item Bonuses

The issue of items providing bonuses to resources is complicated in Diablo III since there are so many different resources. In Diablo II +mana was a simple bonus of use to everyone (though not equally useful). But in Diablo III only the Barbarian benefits from Fury, only the Monk from Spirit, etc. And the bonuses to each resource vary; for some increasing the total pool is viable, for others only improving the fill rate, or decreasing the drain rate. This prevents the team from using some sort of universal "+resource" modifier, and requires a lot of individual item bonus tweaking.

Jay Wilson answered a question about this during an interview from Blizzcon 2010.[1]

Jay Wilson: "Yes we’re definitely going to put in objects that will do that. It’s been a question of how we want to implement that. Right now every class has their own resource. And that’s the goal. If we can’t get that to work, if we can’t make them different and all working adequately, then we might double up on some resources on some characters. We’ve waited to do the itemization until we have the resources locked down. If they’re that different then we might restrict the resource bonuses to class-based items."

"It feels pretty bad when you get say, a sword that’s got… it’s one thing to get a sword with say, plus strength on it, and you decide not to use it because that bonus isn’t really the best for your Wizard. That’s one thing. But if you get a sword that has a resource bonus for another class, that’s entirely unusable for you, that’s no fun. That feels worse than just getting a stat that’s questionably not for you. Having an object that you can equip that states in it a bonus that’s useless to you, that feels bad."

"We do have class-based items for that. We’re also doing a lot with enchantments, because enchantments don’t feel bad if you find an enchantment that’s not for you, the way an item is."

Diablo III Resource Pools

Each class in Diablo III has a unique resource.

Barbarian: Fury

Fury, abandoned "traffic light" form.

Fury is the resource pool for the Barbarian in Diablo III. It is generated by taking damage or using Fury Generating skills, and expended by using Fury Spending or some Situational skills.

• Generated by:
  • Using Fury Generating skills.
  • Dealing damage.
  • Taking damage.

• Spent by:
  • Using Fury Spending skills.
  • Inactivity over time.
  • Unknown if some creatures can leech it.

• Fury related Barbarian Passives:
  • Weapon Master: Gain extra Fury by using Mighty Weapons.
  • Berserker Rage: Inflict more damage at maximum Fury.
  • Animosity: Increase maximum Fury and its generation.
  • Superstition: Generate extra Fury when hit by ranged or elemental attacks.
  • No Escape: Critical Hits with Weapon Throw have a chance to return Fury.
  • Relentless: In near death situation, skills cost no Fury.
  • Unforgiving: Fury no longer degenerates, instead it gives a steady generation.

Demon Hunter: Hatred & Discipline

The Demon Hunter uses two resources. Hatred, which recharges quickly, is used for combat abilities and Discipline, which has slow recharge, is used for tactical and support abilities.

• Generated by:
  • Regeneration over time (can be boosted by items, skills, and passives).
  • Using Hatred Generating skills.

• Spent by:
  • Using Hatred Spending skills.

• Hatred/Discipline related Demon Hunter Passives:
  • Vengeance: Increases maximum Hatred. In addition, gain Hatred and Discipline from Health Globes.
  • Night Stalker: Critical Hits may restore Discipline.
  • Fundamentals: Basic Attacks restore Hatred.
  • Hot Pursuit: Gain increased movement speed at full Hatred.
  • Perfectionist: Reduces Discipline cost of all skills.
  • Grenadier: Increased Hatred generation from Grenades and Cluster Arrow costs less Hatred.

Monk: Spirit

The Monk uses Spirit, the resource the developers frequently cite[2] as their favorite and the one they feel is working the best. Spirit is generated by striking enemies with the various Spirit Generating skills and expended using Spirit Spending abilities. Spirit is also modified by various of the Monk Passives. This design makes the combos, all of which are quite powerful melee attacks, free to use.

A Monk could play fairly effectively using nothing but combo skills, all of which carry substantial bonuses on top of their damage, so making them yield Spirit to fuel the other Monk Skills as well seems quite a bargain for the class.

• Generated by:
  • Using Spirit Generating skills.

• Spent by:
  • Using Spirit Spending skills.

• Spirit related Monk Passives:
  • The Guardian's Path: Spirit generation increased when using two-handed weapons.
  • Transcendence: Every point of Spirit spent heals you.
  • Chant of Resonance: While a Mantra is active, you gain spirit every second.
  • Exalted Soul: Increases maximum spirit.
  • Near Death Experience: When receiving a fatal blow, you're restored to 35% life and spirit.

Witch Doctor: Mana

Mana is the best understood resource pool. It's appeared in countless RPGs, including Diablo I and Diablo II, and appears with the familiar blue color in Diablo III. It's spent by the Witch Doctor skills and assisted in regeneration by various Witch Doctor Passives.

• Restored by:
  • Regeneration over time (can be boosted by items, skills, and passives).

• Spent by:
  • Using abilities with Mana cost.
  • Some enemies may drain Mana with their attacks.

• Mana related Witch Doctor Passives:
  • Spiritual Attunement: Increases maximum Mana and its regeneration.
  • Gruesome Feast: Gain Mana from Health Globes.
  • Blood Ritual: A small percentage of Mana costs are paid with Life.
  • Pierce the Veil: Mana costs are increases but also deal more damage.
  • Rush of Essence: Spirit Spells return their Mana cost over time.
  • Vision Quest: Mana regeneration is increased when 4 or more skills are on cooldown.
  • Grave Injustice: Gain Mana with each enemy killed.

Wizard: Arcane Power

Arcane Power is the new resource for the Wizard class, replacing Instability, which replaced Mana. Arcane Power grants the Wizard a pool that can not be scaled up by levels or items. Only Wizard skills and Wizard Passives can help increase or even reduce Arcane Power and its regeneration rate. lower the cost of skills, or increase the regeneration rate.

• Restored by:
  • Regeneration over time (can be boosted by items, skills, and passives).

• Spent by:
  • Using abilities with Arcane Power cost.

• Arcane Power related Wizard skills:
  • Energy Armor: Lowers maximum Arcane Power but increases defense.

• Arcane Power related Wizard Passives:
  • Power Hungry: Gain Arcane Power from Health Globes.
  • Prodigy: Gain Arcane Power by using Signature spells.
  • Virtuoso: Wand attacks generate Arcane Power.
  • Astral Presence: Increase maximum Arcane Power and its regeneration.

Development

All of the classes debuted with some form of Mana for their resource. Their permanent resources were added in during later development, and tinkered with extensively.

Barbarian

Fury is the Barbarian's resource. It builds up as the Barbarian takes damage or uses Fury Generating abilities, and is expended on use of Fury Spending and some Situational abilities.

Fury debuted at BlizzCon 2008, in the form of a globe. During later development it changed into a "traffic light" stack of three orbs at Blizzcon 2009, before changing back to a full globe in early 2010. Many more details can be seen on the Fury article.

Monk

Spirit is the Monk's resource. It's built up by dealing damage with Spirit Generating abilities and expended on use of Spirit Spending abilities. It was described in mid-2010, and debuted at Blizzcon 2010 in October of that year.

Witch Doctor

Mana is the Witch Doctor's resource. It works much as Mana did in Diablo I and Diablo II; some amount is expended with each cast spell from a pool that regenerates over time. Various skills and items can hasten the regeneration rate, and the Witch Doctor can also gain mana from health orbs or fallen enemies if he has invested in the Gruesome Feast or Grave Injustice passive skill respectively.

Wizard

Arcane Power is the Wizard's resource. While Wizard is usually compared with Diablo II's Sorceress, their resources are completely different. Arcane Power is a fixed amount and can only be increased with certain Wizard passives. Prior to Arcane Power, the Wizard used Instability, which was scrapped since it did not make the character feel "glass cannon-y" enough.

Demon Hunter

Hatred and Discipline is the Demon Hunter's resource. The Demon Hunter was last class to receive a proper resource since she was the last class to be announced. What makes this particular resource more unique than others is that there are two different resources. The quickly regenerating Hatred, which is used for combat abilities, and the slowly regenerating Discipline, which is used for support and tactical skills.

Reference

• Jay Wilson interview after GamesCom 2010
• Jay Wilson interview
• Bashiok on Non-Mana Resources and Cinematics
• Monk Mana Resource System Progressing
• WWI 2008
• BlizzCon 2008
• BlizzCon 2009

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