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Teamfight Tactics
Teamfight Tactics
17.4|May 27, 2026
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Teamfight Tactics 17.4: Arbiter and Psionic Reworks

4/5 Significant

Arbiter and Psionic items are reworked, with broad champion and trait balance changes. A June 1 follow-up nerfs dominant strategies and buffs Space Groove.

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Key Changes

  • 1Arbiter now guarantees an input and an output from each of three respective categories.
  • 2Psionic items were reworked with more general stats so they can support more compositions.
  • 3The June 1 follow-up nerfed dominant strategies and buffed some champions that had fallen out of the meta.
  • 4Space Groove gained stronger healing and attack speed per Groovian on June 1.
  • 5Ekko’s Patience was temporarily disabled for the remainder of the patch because of a bug.

All Changes

⚖️Arbiter(10)

  • changeArbiter: Arbiter now offers one input from each of the Consistent, Conditional and Economy Based pools and one output from each of the Offense, Defense and Economy pools.
  • buffArbiter: Gold and Leona chances above 100% now use the excess for a second roll, with a maximum of 2 triggers.
  • newArbiter: Attack 3 Times can now grant 12/18 Resists, 3/5% Gold Chance with a maximum of 2/3, or 10/18% Leona Chance.
  • buffArbiter: Every 3 Attacks Ability Power increased from 5/8 to 6/9 and Attack Speed from 3/5% to 4/6%; Every 4 Seconds Attack Speed increased from 11/17% to 14/20%.
  • buffArbiter: For each Interest, Resists increased from 12/18 to 14/22 and shield duration from 4s to 8s; the shield duration for reroll and Arbiter Star Level inputs also increased from 4s to 8s.
  • buffArbiter: For the reroll input, Attack Speed increased from 30/45% to 35/55%, Leona Chance from 50/100% to 70/125%, and Gold Chance from 22% to 30%; Arbiter Star Level Attack Speed increased from 7/8% to 8/9%.
  • nerfArbiter: The reroll input's Ability Power decreased from 30/45 to 25/40.
  • removeArbiter: The below-40% Health, enemy death and 10 damage instances inputs and the Mana and Reroll chance outputs were removed.
  • nerfArbiter: On June 1, Leona chances decreased from 10/18% to 8/12% for Every 3 Attacks, 12/20% to 10/15% for Spend 50 Mana, 15/22% to 14/18% for Every 4 Seconds, and 20/30% to 20/25% for Each Interest.
  • fixArbiter: Fixed Arbiter granting 2 triggers without Arbiter 3 active and Economy triggering more often than intended.

✨Traits(16)

  • buffChallenger: Challenger Attack Speed increased from 15/22/40/55% to 15/28/42/55%.
  • nerfDark Star: Dark Star (6) Bonus decreased from 85% to 70%, and Mini Dark Hole HP decreased from 30% to 25% of Dark Star HP.
  • buffN.O.V.A: N.O.V.A (5) Aatrox damage increased from 50% to 65% of spell damage; Akali bonus bleed per shuriken rose from 10% to 12% and bleed damage from 10/14/18 AD to 12/18/24 AD; Kindred Damage Amp rose from 5% to 10% and mark timer fell from 5s to 4.5s.
  • changeMeeple Emblem: Meeple Emblem changed from 1 Mana Regen per Meep to 50 Health and 4% Damage Amp per Meep.
  • changeDrone Uplink: Psionic Drone Uplink and Radiant Drone Uplink now have 15% and 20% Damage Amp respectively.
  • changeMalware Matrix: Psionic Malware Matrix now has 10% Damage Amp, 15% Attack Speed and 10% Omnivamp, with physical damage reducing Armor by 2 for Attack Champions and magic damage reducing Magic Resist by 2 for Magic Champions; Radiant Malware Matrix has the same listed stats.
  • changeSympathetic Implant: Psionic Sympathetic Implant now has 10% Damage Amp, 15% Attack Speed and 2 Mana Regen; its Radiant version has 10% Damage Amp, 20% Attack Speed and 4 Mana Regen, and both grant Magic Champions 1 Mana Regen or Attack Champions 15% Attack Speed every 5 seconds.
  • changeTarget-Lock Optics: Psionic Target-Lock Optics now has 10% AD, 10% AP and 20% AS, while its Radiant version has 20% AD, 20% AP and 30% AS; first damage to each enemy grants Attack Champions 9% Attack Damage or Magic Champions 7% Ability Power.
  • buffSniper: Sniper Baseline Damage Amp increased from 18/24/28% to 18/25/35%.
  • buffSpace Groove: Space Groove (7) Bonus increased from 10% to 15%; on June 1, (3) Groove Duration increased from 3s to 4s, Heal Per Groovian from 8.5% to 9.5% max HP, and AS Per Groovian from 11% to 12%.
  • buffStargazer Fountain: Stargazer Fountain healing increased from 2.5% to 3% and its (5) bonus AD/AP per 2s from 7% to 9%.
  • buffStargazer Huntress: Stargazer Huntress Stargazer Attack Speed increased from 12/35/55% to 15/45/70% and marks from 3/5/7 to 3/5/9; on June 1, base AS increased from 12% to 15%.
  • nerfStargazer Huntress: Stargazer Huntress teamwide Attack Speed decreased from 15% to 12%.
  • nerfStargazer Serpent: Stargazer Serpent Magic Damage decreased from 25/40/60% to 20/40/60%.
  • nerfStargazer Mountain: Stargazer Mountain Attack Speed decreased from 10% to 8% and Durability from 6% to 5%.
  • buffStargazer Medallion: On June 1, Stargazer Medallion Base Damage Amp increased from 12% to 15%.

🛡️Champions(30)

  • buffAatrox: Aatrox Heal increased from 300/375/575 AP to 325/400/650 AP.
  • buffTwisted Fate: Twisted Fate minimum damage increased from 180/270/405/690 AP to 190/285/430/730, and maximum damage from 360/540/810/1380 AP to 380/570/860/1460.
  • buffBel’Veth: Bel’Veth Spell Damage increased from 18/27/41/69 AD to 20/30/45/77.
  • buffGnar: Gnar Base AS increased from 0.7 to 0.75.
  • buffGwen: Gwen Resists increased from 45 to 50 and single-target damage from 145/220/380/650 AP to 145/220/410/700.
  • buffJax: Jax flat damage reduction increased from 15/20/25 AP to 20/25/30.
  • nerfJax: Jax flat damage reduction no longer scales with AP.
  • changeZoe: Zoe Spell Damage initially increased from 68/102/153% AP to 73/110/180 AP; on June 1, Ability Damage decreased from 73/110/180% AP to 68/102/180 AP.
  • buffAurora: Aurora Split Damage increased from 370/555/890 AP to 400/600/960 AP.
  • nerfLulu: Lulu Mountain Spell Stun Duration decreased from 0.5s to 0.25s.
  • buffMiss Fortune (Replicator): Miss Fortune (Replicator) Spell Damage increased from 250/375/600 AD to 275/415/660 AD.
  • buffOrnn: Ornn Base Health increased from 850 to 950.
  • nerfRhaast: Rhaast Redeemer Attack Speed decreased from 2/2.5/3% to 2/2/2%, and Bonus Resists from 2/2.5/3 to 2/2/2.
  • buffViktor: Viktor Spell Damage increased from 185/275/475 AP to 190/290/500 AP.
  • nerfCorki: Corki Missile Damage decreased from 30/44% AD to 28/42% AD and Meeple Rocket Damage from 120/180% AD to 110/165% AD.
  • buffMorgana: Morgana Shield HP Scalar increased from 10% to 15%; on June 1, Mana decreased from 30/90 to 30/80.
  • changeMorgana: Morgana Range decreased from 2 to 1.
  • buffNami: Nami Mana changed from 25/70 to 20/65.
  • changeXayah: Xayah Base AD initially increased from 50 to 52 and Spell Main Target Damage from 10/15% AD to 25/40% AD; on June 1, Base AD decreased from 52 to 49.
  • nerfFiora: Fiora Spell True Damage decreased from 40/60 AD to 37/56 AD.
  • buffGraves: Graves Base AS increased from 0.7 to 0.75.
  • nerfGraves: Graves Laser Ballistics Falloff Per Target increased from 40% to 60%.
  • buffShen: Shen Mana changed from 10/70 to 20/70 and Spell Damage increased from 20/30 AP to 25/40 AP.
  • buffZed: Zed Clone Health increased from 33/40% to 33/45%.
  • nerfZed: Zed starting Mana decreased from 50/100 to 40/100.
  • buffEzreal: On June 1, Ezreal Base AD increased from 40 to 45.
  • nerfTalon: On June 1, Talon Ability Damage decreased from 430/645/1000 AD to 400/600/1000 AD.
  • buffAurelion Sol: On June 1, Aurelion Sol Mech Ability Damage increased from 82/123 AP to 86/130 AP.
  • nerfBlitzcrank: On June 1, Blitzcrank Mana changed from 20/100 to 30/120.
  • nerfVex: On June 1, Vex Ability Damage decreased from 30/45 AP to 27/40 AP.

🎁God Boons and Offerings(2)

  • nerfEkko’s Boon: Ekko’s Boon Specialist Star Damage decreased from 85 to 70.
  • removeChest of Greed: Chest of Greed was disabled due to a bug.

🔮Augments(9)

  • changeShieldmaiden (Leona) Mana changed from 10/40 to 20/50; Self-Destruct (Gragas) damage decreased from 280/420/630 AP to 250/375/600 AP, and Reach for the Stars (Jax) damage from 170/250/450 AP to 160/240/420 AP.
  • buffOne Two Three now grants 2 rather than 1 1-costs, and Booster Pack total value increased from 10g to 12g.
  • buffCharge Transfer I Damage Amp increased from 5% to 7% and Charge Transfer II from 8% to 10%; Climb the Ladder I Stats increased from 3 to 3.5 and Climb the Ladder II from 5 to 6.
  • buffExalted Adventure rewards increased ~15%, Heroic Grab Bag gold increased from 4 to 5, and Luxury Subscription gold per trigger increased from 5 to 7.
  • buffHeart of Steel Health Per Growth increased from 12 to 16; Heart of the Swarm now also grants 2 Tiny Duplicators, with Apex Primordian AS rising from 0.6 to 0.9 and Mana falling from 30/100 to 30/90.
  • nerfHard Commit gold per stage decreased from 4 to 3; Hold the Line bonus AD decreased from 9% to 8% and bonus AP from 10% to 9%.
  • nerfGroup Hug I Resists decreased from 7 to 6 and Group Hug II from 10 to 9; Kahunahuna bonus true damage decreased from 125% AD to 100% AD.
  • changeSweet Treats Health Per Item decreased from 20 to 16, while Timestream Health Per Reroll increased from 2 to 7.
  • changeMace’s Will and Sunfire Board are no longer offered on 2-1, and Misfits is no longer offered on 4-2 as of June 1.

⚔️Items and Emblems(6)

  • buffRadiant Adaptive Helm non-tank AD/AP increased from 25 to 40 and Mana Regen from 6 to 7; Radiant Dragon’s Claw percent max Health increased from 22% to 28%.
  • changeRadiant Gargoyle’s Stoneplate Resists Per Enemy decreased from 25 to 20, Radiant Guinsoo’s Rageblade Attack Speed Per Second increased from 14% to 16%, and Radiant Nashor’s Tooth on-crit Mana on attack decreased from 8 to 6.
  • buffBlighting Jewel MR Reduction increased from 4 to 6, Luden’s Tempest AD/AP from 55% to 60%, and Yasuo’s Bladework Attack Speed from 10% to 20%.
  • removeEkko’s Patience: Ekko’s Patience Damage Amp was increased from 40% to 45%, but the Artifact was temporarily disabled for the remainder of the patch due to a bug.
  • buffArbiter Emblem: Arbiter Emblem Attack Speed increased from 20% to 30%.
  • nerfRogue Emblem: Rogue Emblem Omnivamp decreased from 40% to 25%.

🥊Choncc’s K.O. Coliseum(2)

  • nerfStar Guardian and Soul Fighter Prismatic Breakpoints increased from 10 to 11 in Choncc’s K.O. Coliseum.
  • fixFixed Mighty Mech transformation and early-combat death cases that caused units to become invulnerable, and fixed Crowd Favorite reputation not progressing at the Soul Fighter prismatic requirement.

🐛Bug Fixes(7)

  • fixVarus’ Boon: Fixed Varus’ Boon granting the incorrect amount of health.
  • fixFixed Nunu and Willump rarely reviving during combat, some incorrect Master Yi dash targets, and Samira’s Passive triggering too often against crowd-control-immune targets.
  • fixDark Star 6 mini Black Holes no longer benefit from Exiles and Two Tanky, and Loot Singularity is properly disabled in Tocker’s Trials.
  • fixSoraka’s Miracle: Soraka’s Miracle now functions properly when a champion has more than one, and its champion heal waits for the current heal to end before triggering again.
  • fixFixed some Double Up cannon disappearances after Realm of the Gods Rounds, Boxing Lessons HP updating incorrectly, and Steamroll+ not properly granting 1 gold per win.
  • fixLevel up and Upward Mobility are now mutually exclusive with Wise Spending.
  • fixCorrected Morgana’s cost in Pengu’s Blessing and the Timebreaker and Luden’s Tempest tooltips.

Summary

Traits and champions

Arbiter offers a wider distribution of inputs and outputs, while Psionic items have more general stats. Challenger, N.O.V.A, Sniper, Space Groove and parts of Stargazer receive buffs, while Dark Star (6) is weakened. Champion changes include buffs to Aatrox, Twisted Fate and Bel’Veth, alongside nerfs to Corki and Fiora.

Mid-patch updates

The May 29 fixes address Arbiter triggers and Varus’ Boon, while Ekko’s Patience is disabled for the rest of the patch. On June 1, Vex, Blitzcrank, Xayah and Arbiter Leona outputs were nerfed; Space Groove and several champions were buffed.

Items, augments and modes

Augments, Radiant items, Artifacts and Emblems were adjusted. Choncc’s K.O. Coliseum raises the Star Guardian and Soul Fighter Prismatic breakpoints from 10 to 11 and fixes Mighty Mech and Crowd Favorite issues.

← OlderTeamfight Tactics Patch 17.3: Morgana ReworkMay 12, 2026Newer →Teamfight Tactics 17.5: Pengu's Party and BalanceJun 9, 2026

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