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Prototype: Omnistone is a rune in 
League of Legends.
League of Legends.
Notes
- Conqueror or Press the Attack cannot be gained as the first keystone.
- In Ultra Rapid Fire, Omnistone can still give Lethal Tempo, despite the substitution.
- PENDING FOR TEST: The attack speed buff is capped at double the base cap (5.00) ?
- Omnistone can still grant Predator if the user has Magical Footwear but has not been granted the boots yet.
"Smart" Keystone Chances
- "Smart" selection takes place before Omnistone rolls its table of Keystones; if an ideal situation is found it will have an 8 - 15% increased chance to roll the relevant Keystone if it is not currently removed from its table.[1]
- A specific Keystone will be given to the user under many circumstances fit for the gameplay scenario. The following have an increased chance to be given:
- Conqueror when the user and other enemy champions have high health, further increased chance for melee champions.
- Fleet Footwork if the user is low health and below level 9.
- Dark Harvest when near low health enemy champions.
- Hail of Blades when near low health enemy champions and building attack speed or attack damage.
- Predator when not near enemy champions, and less likely to get it when in combat with nearby enemy champions.
- Summon Aery if the user has healing and shielding power and are near a low health ally who is in combat.
- Glacial Augment if the user owns an active item with a slow that is off cooldown.
Dark Harvest Soul Bonuses
- The following Keystones have their stats enhanced based on the number of Dark Harvest stacks. Soul bonuses are relative to the damage per stack of Dark Harvest per map, meaning it can be lower or higher depending on the mode.[2] (The following are based on Summoner's Rift, with Dark Harvest dealing 5 damage per soul):
- Conqueror gains (+ 2.5% per Soul) more adaptive force
- This bonus applies to each stack.
- Fleet Footwork gains (+ 5 per soul) healing and (+ 5% per soul) bonus movement speed when activated.
- Lethal Tempo gains (+ 5% per Soul) bonus attack speed when activated.
- Press the Attack gains (+ 10 per soul) adaptive damage when activated.
- Notably, the damage from Exposed doesn't increase.
- Electrocute gains (+ 5 per soul) adaptive damage when activated.
- Hail of Blades gains (+ 5% per soul) bonus attack speed when activated.
- Predator gains (+ 5 per soul) adaptive damage.
- Notably, no bonus movement speed is gained on activation.
- Arcane Comet gains (+ 5 per soul) adaptive damage when activated.
- Phase Rush gains (+ 5% per Soul) bonus movement speed and slow resist when activated.
- Summon Aery gains (+ 5 per soul) enemy adaptive damage or ally shielding when activated.
- Aftershock gains (+ 2.5% per Soul) bonus armor and armor scaling, (+ 2.5% per Soul) bonus magic resistance and magic resistance scaling, and (+ 3.75 per Soul) more magic damage.
- Resistance scaling increases multiplicatively.
- Grasp of the Undying gains (+ 3.33% per Soul) healing and damage per empowered attack, and also, (+ 5% per Soul) maximum health per stack, including ones previously gained.
- Glacial Augment gains (+ 2.5% per Soul) slow effectiveness.
Trivia
- The name "Kaleidostone" was the placeholder for this rune during the removal of Kleptomancy.
Media
Prototype: Omnistone with Precision
Prototype: Omnistone with Domination
Prototype: Omnistone with Sorcery
Prototype: Omnistone with Resolve
Patch History
- Removed: Can no longer gain Conqueror or Press the Attack as its first Keystone.
- Bug Fix: Champions may no longer trigger Grasp of the Undying several times in one rotation.
- Bug Fix: Omnistone-granted Predator now has a proper cooldown regardless of when the user upgrades its boots.
- Cooldown for melee champions reduced to 5 − 3 (based on level) seconds from 7 − 3 (based on level).
- Cooldown for ranged champions reduced to 9 − 7 (based on level) seconds from 11 − 7 (based on level).
- Now displays how much damage it has dealt and how many buffs it has granted. Buffs include: Lethal Tempo's attack speed, Fleet Footwork's Haste, Press the Attack's Vulnerable, Conqueror's Enrage, Hail of Blades' attack speed, Predator's Haste, Phase Rush's Haste, Summon Aery's shield, Aftershock's resistances, or Glacial Augment's slow.
- Increased chance to be given Predator when not near enemy champions, and less likely to get it when in combat with nearby enemy champions.
- Increased chance to be given Dark Harvest when near low health enemy champions.
- Increased chance to be given Hail of Blades when near low health enemy champions and building attack speed or attack damage.
- Increased chance to be given Conqueror when both you and enemies have high health, further increased chance for melee champions.
- Increased chance to be given Fleet Footwork if you are low health and below level 9.
- Increased chance to be given Glacial Augment if you have a Glacial item off cooldown.
- Increased chance to be given Summon Aery when you have healing/shielding power and are near a low health ally who is in combat.
- V9.23 - November 21st Hotfix
- Cooldown for melee champions reduced to 7 − 3 (based on level) seconds from 8 − 4 (based on level).
- Cooldown for ranged champions reduced to 11 − 7 (based on level) seconds from 12 − 8 (based on level).
- V9.23 - Added
- Replaces Kleptomancy.
- Inspiration Keystone rune.
- Periodically gain a single use of another random keystone. Once a keystone is rolled, it can't be rolled again until only three options are left, at which point the table resets (you won't get the keystone you just used, though).
- Gain a new keystone 8 − 4 (based on level) seconds after using the last. (Increased to 12 − 8 (based on level) seconds for ranged champions).
- Gain a new keystone while out of combat after 40 seconds of not using a keystone.
- Your current keystone shows up to the right of your health bar. All ten players can see it.
- Dark Harvest souls persist after you get a different keystone and affect all your other keystones. Grasp of the Undying's health persists after you get a different keystone, too.
- Available Keystones: Press the Attack, Lethal Tempo, Fleet Footwork, Conqueror, Summon Aery, Arcane Comet, Phase Rush, Electrocute, Predator, Dark Harvest, Hail of Blades, Grasp of the Undying, Aftershock, and Glacial Augment.
- Predator is only available to champions who have already purchased boots. Dark Harvest souls amplify the effects of all keystones. Aftershock is only available to champions who have learned a basic spell that can trigger it.
- Does not re-roll if in-combat.
- Keystones cycle pseudo randomly - you cannot repeat a keystone for 5 rolls after it has been used.
- Entering the fountain will reroll your current keystone.
References
 Precision
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 Domination
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 Sorcery
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 Resolve
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 Inspiration
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 Removed
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