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    legendary gems guideLegendary Gems were first officially revealed in the Patch 2.1 preview blog back in June of this year.   They will be added to Reaper of Souls in Patch 2.1, and are currently undergoing testing on the PTR.

    The gems add special bonuses when socketed in rings and amulets (only on Characters and not on Followers), and can be upgraded in power via DiabloWikiUrshi, the NPC who appears after Greater Rifts are cleared.

    While the developers are calling them “legendary gems” these socketables have nothing in common with regular DiabloWikigems in stats or appearance, and are more analogous to the Rainbow Facet unique jewels of Diablo 2. The main difference in Diablo 3 is that these gems can only be socketed in jewelry, and the way the gems can be upgraded to improve their functions over time.

    Legendary Gems Listing

    While the Legendary Gems are still undergoing development on the DiabloWikiPTR, their stats and bonuses are changing constantly. A major revision was created on July 15, 2014 with new or upgraded stats for almost every gem. The following are the most current details about Legendary Gems.

     

    DiabloWikiBane of the Powerful
    bane of the powerful
    • Gain 30% increased damage for 20 seconds after killing an elite pack.
    • Upgrade rank grants: +1 second buff duration.
    • Rank 50 unlocks: Gain 20% bonus damage to elites.
    DiabloWikiBane of the Trapped
    bane of the trapped
    • Increase damage against enemies under control-impairing effects by 20%.
    • Upgrade rank grants: +0.5% damage.
    • Rank 50 unlocks: Gain an aura that reduces the movement speed of enemies within 15 yards by 30%.
    DiabloWikiBoon of the Hoarder
    • 30% chance on killing an enemy to cause an explosion of gold.
    • Upgrade rank grants: +1% chance on kill.
    • Rank 50 unlocks: Gain 30% increased movement speed for 3 seconds after picking up gold.
     DiabloWikiEnforcer
     enforcer
    • Increase the Critical Hit Chance of your pets by 20%.
    • Upgrade rank grants: +0.4% Critical Hit Chance. Max +20% upgrade (+40% total).
    • Rank 50 unlocks: Your pets are unkillable.
    Bliz Note: As was discussed in another thread, allowing this this gem to rank up to +100% pet Crit would likely cause undesired gearing issues and probably be a little out of line.
    DiabloWikiGem of Efficacious Toxin
    gem of efficacious toxin
    • Poison all enemies hit for 1000% weapon damage over 10 seconds.
    • Upgrade rank grants: +20% weapon damage over 10 seconds.
    • Rank 50 unlocks: All enemies you poison take 10% increased damage from all sources.
    DiabloWikiGogok of Swiftness
     gogok of swiftness
    • 50% chance on hit to gain Swiftness, increasing your Attack Speed by 2% for 3 seconds. This effect stacks up to 10 times.
    • Upgrade rank grants: +1% chance.
    • Rank 50 unlocks: Gain 2% Cooldown Reduction per stack of Swiftness.
     DiabloWikiInvigorating Gemstone
     invigorating gemstone
    • While under any control-impairing effects, reduce all damage taken by 30%.
    • Upgrade rank grants: +1%. Maximum +50% upgrade (80% total).
    • Rank 50 unlocks: Heal for 20% of maximum life when hit by control-impairing effect.
     DiabloWikiMirinae, Teardrop of Starweaver
     Mirinae, Teardrop of Starweaver
    • 15% chance on hit to smite a nearby enemy for 1000% weapon damage as Holy.
    • Upgrade rank grants: +20% weapon damage.
    • Rank 50 unlocks: Smite a nearby enemy every 5 seconds.
     DiabloWikiMoratorium
     Moratorium
    • 30% of all damage taken is instead staggered and dealt to you over 3 seconds.
    • Upgrade rank grants: +0.1 second to the stagger duration.
    • Rank 50 unlocks: 10% chance on kill to clear all staggered damage.
     DiabloWikiPain Enhancer
     Pain Enhancer
    • Critical hits cause the enemy to bleed for 500% weapon damage as Physical over 3 seconds.
    • Upgrade rank grants: +10% weapon damage over 3 seconds.
    • Rank 50 unlocks: Gain Blood Frenzy, granting you 2% increased Attack Speed for each bleeding enemy within 20 yards.
    DiabloWikiSimplicity’s Strength
     Simplicity's Strength
    • Increase the damage of primary skills by 25%.
    • Upgrade rank grants: +0.5% damage.
    • Rank 50 unlocks: Primary skills heal you for 2% of maximum health on hit.
    DiabloWikiTaeguk
     Taeguk
    • Gain 1% increased damage for 4 seconds after spending primary resource. This effect stacks up to 10 times. Gaining a stack refreshes all existing stacks.
    • Upgrade rank grants: +1 max stack.
    • Rank 50 unlocks: Gain 1% increased Armor for every stack.
    Bliz Note: This buff duration on this gem was chosen so that it’s easier to keep up with cheap spenders and not trivial with expensive spenders.
    DiabloWikiWreath of Lightning
     Wreath of Lightning
    • 15% chance on hit to gain a Wreath of Lightning, dealing 500% weapon damage as Lightning every second to 1-2 nearby enemies for 3 seconds.
    • Upgrade rank grants: +10% weapon damage per second.
    • Rank 50 unlocks: While under the effect of the Wreath of Lightning, gain 25% increased movement speed.
    DiabloWikiZei’s Stone of Vengeance
     Zei's Stone of Vengeance
    • Damage you deal is increased by 6% for every 10 yards between you and the enemy hit. Maximum 30% increase.
    • Upgrade rank grants: +0.1% for every 10 yards (+0.5% to max).
    • Rank 50 unlocks: 30% chance on hit to Stun the enemy for 1 second.
    Bliz Note: The max of 50 yards was added not because it was too powerful (even though it was too powerful), but so that you wouldn’t be incentivized to stay offscreen while your pets killed everything. At 50 yards, I expect you to be in range to actually still use your skills (crazy right?).

    Gem Upgrade Odds

    The only way to upgrade a Legendary Gem is via DiabloWikiUrshi, who only appears when a character defeats the Greater Rift Guardian after the 15 minute timer has expired. So players must fail to finish a Rift in time, but still continue on to clear it and kill the Guardian. (Who drops the same quality of loot in either case.)
    The odds that a gem will be upgraded increase with each higher level Greater Rift completed in that game. There is also a chance that the gem will receive a double, triple, or quadruple upgrade, boosting it 1-4 levels in total. It’s yet not known if anything effects the chances of a double or bigger upgrade, and most fans suspect it’s pure DiabloWikiRNG.

    The Legendary Gem upgrade chances are displayed in the tooltip, so the following figures are not estimations, but are what the game actually says before each upgrade attempt.

    legendary gems upgrade chances

    Legendary Gem upgrade interface from a L19 Greater Rift.

    • Rift Level 01 – Upgrade chance 21%
    • Rift Level 17 – Upgrade chance 45%
    • Rift Level 18 – Upgrade chance 46%
    • Rift Level 19 – Upgrade chance 47%
    • Rift Level 20 – Upgrade chance 49%
    • Rift Level 21 – Upgrade chance 50%
    • Rift Level 22 – Upgrade chance 51%
    • Rift Level 25 – Upgrade chance 55%
    • Rift Level 26 – Upgrade chance 56%
    • Rift Level 27 – Upgrade chance 57%
    • Rift Level 28 – Upgrade chance 58%
    • Rift Level 29 – Upgrade chance 59%
    • Rift Level 30 – Upgrade chance 60%
    • Rift Level 31 – Upgrade chance 61%
    • Rift Level 31 – Upgrade chance 62%
    • Rift Level 33 – Upgrade chance 63%
    • Rift Level 34 – Upgrade chance 64%
    • Rfit Level 35 – Upgrade chance 65%
    • Rift Level 40 – Upgrade chance 70%
    • Rift Level 41 – Upgrade chance 71%
    • Rift Level 45 – Upgrade chance 75%
    • Rift Level 50 – Upgrade chance 79%
    • Rift Level 69 – Upgrade chance 93%
    • Rift Level 100 – Upgrade chance 100%

    Official Theorizing

    Blizzard’s John Yang explained the design theory behind Legendary Gems while they were being tested on the PTR, July 15, 2014.

    Hi everyone. I wanted to pop in here while discussion on Legendary gems is ongoing.

    First off, our philosophy on Legendary gems is that, when you pick one up for the first time, you should immediately want to use it, assuming it’s for your build, since some gems don’t apply to all builds/needs. This puts a minimum bar on the starting power level. After that, the power increase per upgrade is directly related to the frequency of upgrading, which is closely tied to the Greater Rift reward scheme and is still being iterated on. In the end, we’d like gems to be infinitely upgradeable when it makes sense, but not be outrageous.

    Additionally, all Legendary gems have been disabled for followers. These powers were not designed for followers in mind, and this way we can ensure the gems are of a high power level because you can only have 3 equipped. In the future, if followers need avenues of advancement we would likely make Legendary gems specifically designed for them.

    Now for the details. The existing stats you see on Legendary gems on the PTR today are somewhat placeholder. So, to steer further discussion in a direction that’s more in line with the next PTR build, here are the freshly tuned numbers (with some of my notes) for each gem.

    Legendary Gems Gallery

    This legendary gems guide can also be found in the Diablo Wiki where it can be updated by anyone in the community as and when Blizzard make changes to the game.

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