Runestones are a major new system in Diablo III. Runes are socketed into skills, where they often change the function entirely.
See the main runes page for up to date information about runes. This page archives older runestone info, and traces the evolution of this game system since it was first revealed in 2008.
- 1 Archived Runestone Information
- 1.1 Original Rune Functions
- 1.2 Hydra: The First Five Rune Example
- 1.3 Rune Storage
- 1.4 Rune Appearance Evolution
- 1.5 Rune Function Examples
- 1.6 BlizzCon 2009
- 1.7 Further Reading
- 1.8 Trivia (Rune History)
- 1.9 References
Archived Runestone Information
Information further down this page details rune development. It may not be relevant any longer, but should be of archival interest.
Original Rune Functions
Jay Wilson described the five types of runes during an interview from BlizzCon 2009. The quoted sections below are Jay's words: 
- "One tends to be more damage-oriented. One tends to multiply effects, splits projectiles or bigger radiuses, things like that. One tends to be a very energy-efficient rune, so you cut down cost or in some way increases the benefit of the skill, so you get more for less. One tends to be more focused on death effects, critical effects. And one of them we call just... the weird rune, which is our grab bag for anything unusual we want to stick on."
These functions have largely remained in place, though the names of the runes has shifted twice since then.
Hydra: The First Five Rune Example
The first good example of how runes were going to work in the final game came from Jay Wilson at Gamescom 2010.
- Jay Wilson: One of my favorites is on the Wizard. She has a skill called Hydra, which is largely the same as it was in Diablo 2. Fiery (dragon) heads that shoot fireballs. Depending on which rune the Wizard sockets in that skill, the dragon heads change elements, and it’s a major change. Their entire appearance is altered. They can become poison heads, which shoot bolts of poison that leave pools of acid on the ground. There are lightning heads that shoot Chain Lightning. Cold heads that shoot Frost Bolts that slow enemies. Another rune makes for a bigger fire attack, where the head just breaths a cone of flame.
Jay did not list what all five runes did in Hydra, and his explanation left fans confused. Where were the three elemental damage types coming from? Nothing like that seemed to fit wit the previous rune functions.
From his words, we were made to understand that in Hydra, the five runes provide: 1) extra damage (with a changed fire form), 2) Multistrike (rapid fire), 3-5) the 3 elemental properties. Extra damage and multishot are consistent with previously known rune functions. One of the elementals comes from the wildcard rune, and the other comes from what used to be the Energy rune. That rune now functions as a second wildcard in many skills, since changes to the resources made the mana-saving property obsolete. (Plus it just wasn't cool enough, in most instances.)
So the only unexpected rune bonuses in Hydra are the 4th and 5th elemental modifiers. The +damage, +multishot, and one elemental damage type would have been expected. The other two would more predictably have granted an Arcane Power cost reduction and some sort of critical hit or death effect bonus. That they were changed to grant elemental bonuses just goes to show how much variability and variety the Diablo III team is putting into the runes.
They are now stored in the main inventory, and like runes should stack, to save on inventory space.
Rune Appearance Evolution
As of BlizzCast episode 8 (30th of March, 2009)  Runes and Rune Sockets were horizontal rectangles, as seen in the image to the right. Previously, runes and their sockets had been square-shaped.
A more recent image, from August 2010, is seen to the left. Runes are now round, like marbles, and bear striking glyph graphics. In light of this change, it's assumed that the sockets in skills are now round as well.
Rune Function Examples
The D3 Team gave several examples of rune functions during a panel at BlizzCon 2008 when Skill Runes were first revealed as a game feature. (Watch the demonstration on YouTube.) The rune names have all changed since this time. The rune/skill functions have not all changed, but they have been modified somewhat. See the sections further up this page, or on the individual skill pages, for current/accurate information.
Wizard's Mirror Image
Mirror Image Skill: This skill, from the Conjuring Skill Tree, creates a duplicate of the wizard, which is capable of moving around and using spells to attack monsters. (It's not just a decoy or an illusion.)
Hydra/Multistrike Rune: Socketing this rune would increase the number of duplicates. Higher quality levels of the hydra/multi-strike rune would presumably add more duplicates.
Force/Power Rune: Socketing this rune would increase the hit points of each duplicate, and increase the spell's duration.
Wizard's Teleport Skill
Teleport skill: This skill, from the Arcane Skill Tree, teleports the Wizard to the targeted location. The spell isn't quite as quick as it was in Diablo or Diablo 2, since the Wizard leaps up into the air before vanishing, and appears in the air, then falls down to earth.
Striking Rune: Adds damage to targets near where the Wizard appears, functioning something like the Barbarian's Leap Attack skill.
Hydra/Multistrike Rune: Creates a temporary duplicate of the Wizard that will attract enemy fire and will fight and deal damage as well. (This seems to be basically a free way to cast Mirror Image when you Teleport.)
Witch Doctor's Skull of Flame
Skull of Flame skill: The Witch Doctor lobs a flaming skull, grenade style, which explodes on impact, dealing substantial fire damage to nearby targets. Different runes affect this skill in different ways. Here are a couple of examples as presented during a BlizzCon 2008 panel discussion.
Hydra/Multistrike Rune: Socketing this rune causes the flaming skull to skip along the ground, like a stone over water, bounding and creating multiple explosions. Higher quality runes would allow additional bounces.
With Force/Power Rune: Socketing this rune adds a firefield property to the Skull of Flame, creating a small patch of flame on the ground that persists after the skull's explosion and damages any monsters that cross over it.
Hydra/Multistrike Rune: Socketing this rune allows the lightning to chain to multiple targets.
With Viper/Lethality Rune: Socketing this rune causes some of the monsters killed by Electrocute to explode in a nova, dealing damage to other nearby enemies.
Skill Runes were not enabled at BlizzCon 2009, for reasons Jay Wilson elaborated on during an interview after the show:
- Diii.net: They’re still being reworked and you don’t have any further comment?
- Jay Wilson: They’re not being reworked, we had tons of skill runes on the Wizard and the Barbarian but they were so spotty across the entire class we thought it would be more confusing to show them off than to not. So we just disabled them all for the BlizzCon build. But they’re all still there and they work just fine.
During another interview, Jay Wilson explained the creative process of making a rune, and how making any changes at all to the first steps will scrap the end results entirely, as can be seen in the image on the right. 
- Jay Wilson: Well, the system is similar for every class. What we did is we broke down five basic runes. Each rune has a general type of effective pluses. One tends to be more damage-oriented. One tends to multiply effects, splits projectiles or bigger radiuses, things like that. One tends to be a very energy-efficient rune, so you cut down cost or in some way increases the benefit of the skill, so you get more for less. One tends to be more focused on death effects, critical effects. And one of them we call just... the weird rune, which is our grab bag for anything unusual we want to stick on.
- Every active skill -- we define an active skill as a skill that you have to click to activate -- can have all five runes affect it. Each rune will change the function of the skill. Some of the changes are minor, there are some cases where there's not much appreciable effect. And then some cases are much more drastic, where for example with Ice Storm or Blizzard, one of the things we're playing around with, this halo of frost whips around her and anyone that moves through it takes damage. That adds on to the effects that Ice Storm already does. So there's a whole bunch of different... the basic idea is to capture that dream of, I'm gonna customize my skills. Even though you and I have the exact same skills, we don't play the same because our skills are different. And then throughout the game, the runes will upgrade in power. So that will just increase and amplify the effect that they have.
You can find out more of the essential information about Diablo I and Diablo II runes in the.
Diablo II Runes
- - The main page for D2 runes.
- - All your questions about runes are answered here.
- - All the runes in Diablo II, and how you can create a rune from a fourteen trillion .
- - See how runewords work.
- - Get to know more about the socket mechanic.
Diablo I Runes
The Diablo I expansion, Hellfire added "runes" as a trap-like type of item. Read more about them in the article.
Trivia (Rune History)
What do you really know about runes? The ones from our world come from the ancient Vikings, and their "futhark" (equivalence of our 'Alpha Bet(a)') (which again come from the even more ancient Tibetan Yantras). They allegedly hold magic powers, and the magicks of the 'runa' are still practised today. These practices, called "Seden", are of course done mostly as a pastime, but some forms of the old runes were used in proper form as late as early 20th century in the 'Dalarna' area of Sweden...
In Sanctuary, however, runes are magically inscribed symbols. Though their use has changed slightly in the last 20 years, they used to grant (sufficiently prepared) items magical properties. For sages of these runes, magical would be created to remake a mundane item into a Runic Item, with powers competing with magical artifacts.
Besides the fact that these supposedly ancient runes hold great and mystic powers, we know little about them. Who created them or how they are created is unknown. They seem to attract demons of different kinds, as they are often found on their corpses. If the runes are of demonic origin is not known either. They could have been the simple writing language of the first inhabitants of Sanctuary, who themselves were more powerful than Demons or Angels. Whatever the origin, they are of great use to heroes wishing to dethrone Diablo or Baal.
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