What's new· Released 2026-05-27
Arbiter Redesign & Psionic / N.O.V.A. Glow-up
17.4 brings quality-of-life buffs to Arbiter, N.O.V.A. and Psionic so all their outputs and items feel worthy of selecting — plus champion buffs across every cost tier to unlock more comp diversity.
Arbiter rework — input / output restructured
3 input categories (Ongoing / Conditional / Economy) × 3 output categories (Offense / Defense / Economy) — every game now offers one from each. Removes dead inputs (HP < 40%, enemy dies, deal 10 instances of damage) and outputs (gain Mana, free reroll chance).
Psionic items redesigned
Drone Uplink / Malware Matrix / Sympathetic Implant / Target-Lock Optics all get baseline Damage Amp + Attack Speed so they fit more carries. Target-Lock Optics fully reworked to per-enemy first-hit proc.
N.O.V.A. (5) carry enablement
Aatrox damage 50% → 65%, Kindred damage amp 5% → 10% with faster Mark timer (5s → 4.5s), Akali bleed buffed across the board. Meeple Emblem reworked from mana regen to +50 HP & 4% Damage Amp per Meep.
Morgana — melee tank now
Range 2 → 1 (forced melee positioning), shield HP scalar 10% → 15%. 17.3's 4-cost rework finally lands the role identity.
Stargazer Fountain + Huntress tuned
Fountain heal 2.5% → 3%, (5) bonus AD/AP per 2s 7% → 9%. Huntress trades teamwide AS (15→12%) for stronger Stargazer-only scaling (12/35/55 → 15/45/70%) and more marks (3/5/7 → 3/5/9).
System & God Boons
- REMAhri · Chest of GreedGod Offering disabled due to bug
- NERFEkko's Boon · Specialist Star Damage85 → 70
Traits
Arbiter — major rework- NEWExcess probabilityWhen gold/Leona chance exceeds 100%, excess rolls for a 2nd trigger (max 2)
- NEWAttack 3× → Resists (new)+12/18 AR/MR
- NEWAttack 3× → Gold chance (new)3/5% (max 2/3)
- NEWAttack 3× → Leona chance (new)10/18%
- REMRemoved inputsBelow 40% HP · enemy dies · deal 10 instances of damage
- REMRemoved outputsArbiters gain Mana · Free reroll chance
- BUFFEvery 3 attacks → AP5/8 → 6/9
- BUFFEvery 3 attacks → AS3/5% → 4/6%
- BUFFEvery 4s → AS11/17% → 14/20%
- BUFFPer interest → Resists12/18 → 14/22 (shield duration 4s → 8s)
- BUFFRerolled → AS30/45% → 35/55%
- BUFFRerolled → Leona chance50/100% → 70/125%
- BUFFRerolled → Gold chance22% → 30% (shield 4s → 8s)
- BUFFPer Star Level → AS7/8% → 8/9% (shield 4s → 8s)
- ADJInput structure3 categories: Ongoing (every 4s / per Star Level) · Conditional (3 attacks / 50 mana) · Economy (per interest / rerolled last turn)
- ADJOutput structure3 categories: Offense (AP / AS) · Defense (max HP / HP shield / resists) · Economy (gold chance / Leona chance)
- NERFRerolled → AP30/45 → 25/40
Challenger- BUFFAttack Speed15/22/40/55% → 15/28/42/55%
Dark Star- NERF(6) Bonus85% → 70%
- NERF(6) Mini Dark Hole HP30% → 25% of Dark Star HP
N.O.V.A. (5)- BUFF
Aatrox50% → 65% of spell damage - BUFF
Akali10% → 12%
- BUFFAkali10/14/18 → 12/18/24 AD
- BUFF
Kindred5% → 10% - BUFFKindred5s → 4.5s
Psionic items — reworked- ADJDrone Uplink (2)15% Damage Amp baseline
- ADJMalware Matrix (2)10% Damage Amp · 15% AS · 10% Omnivamp · AD champs: −2 target armor on phys hit · AP champs: −2 target MR on magic hit
- ADJSympathetic Implant (2)10% Damage Amp · 15% AS · +2 Mana Regen · Every 5s: AP champ +1 mana regen, AD champ +15% AS
- ADJTarget-Lock Optics (2) · reworked10% AD · 10% AP · 20% AS · on first damage vs each enemy: AD champ +9% AD, AP champ +7% AP
- ADJRadiant (4) variantsHigher numbers across all 4 Psionic items
Sniper- BUFFBaseline Damage Amp18/24/28% → 18/25/35%
Space Groove- BUFF(7) Bonus10% → 15%
Stargazer · Fountain- BUFFHealing2.5% → 3%
- BUFF(5) Bonus AD/AP per 2s7% → 9%
Stargazer · Huntress- BUFFStargazer Attack Speed12/35/55% → 15/45/70%
- BUFFMark count3/5/7 → 3/5/9
- NERFTeamwide Attack Speed15% → 12%
Stargazer · Serpent / Mountain- NERFSerpent · magic damage25/40/60% → 20/40/60%
- NERFMountain · AS10% → 8%
- NERFMountain · durability6% → 5%
Champions
1-cost
- BUFFAatroxHeal 300/375/575 → 325/400/650 AP
- BUFF
Twisted FateReverts 17.3 nerf — min dmg 180/270/405/690 → 190/285/430/730 · max dmg 360/540/810/1380 → 380/570/860/1460 AP
2-cost
- BUFF
Bel'VethReverts 17.3 nerf — spell dmg 18/27/41/69 → 20/30/45/77 AD - BUFF
GnarBase AS 0.7 → 0.75 - BUFF
GwenResists 45 → 50 · single-target dmg 145/220/380/650 → 145/220/410/700 AP - BUFF
ZoeSpell dmg 68/102/153% → 73/110/180 AP (no % scaling on top tier) - ADJ
JaxFlat dmg reduction now flat (no AP scaling): 15/20/25 → 20/25/30
3-cost
- BUFF
AuroraSplit dmg 370/555/890 → 400/600/960 AP - BUFF
Miss FortuneSpell dmg 250/375/600 → 275/415/660 AD - BUFF
OrnnBase HP 850 → 950 - BUFF
ViktorSpell dmg 185/275/475 → 190/290/500 AP - NERF
LuluStun duration 0.5s → 0.25s - NERF
RhaastAS 2/2.5/3% → 2/2/2% (flat) · resists 2/2.5/3 → 2/2/2 (flat)
4-cost
- BUFF
NamiMana 25/70 → 20/65 - BUFF
XayahBase AD 50 → 52 · spell main target dmg 10/15% → 25/40% AD - ADJ
MorganaRange 2 → 1 (forced melee tank positioning) · shield HP scalar 10% → 15%
- NERF
CorkiMissile dmg 30/44% → 28/42% AD · Meeple rocket dmg 120/180% → 110/165% AD
5-cost
- BUFF
ShenMana 10/70 → 20/70 · spell dmg 20/30 → 25/40 AP - ADJ
GravesBase AS 0.7 → 0.75 (buff base) · Laser Ballistics falloff 40% → 60% (nerf upgrade) - ADJ
ZedClone HP 33/40% → 33/45% · mana 50/100 → 40/100 - NERF
FioraTrue dmg 40/60 → 37/56 AD
Augments
Buffs
- BUFF
An Exalted AdventureRewards increased ~15% - BUFF
Booster PackTotal value 10 → 12 gold - BUFF
Charge Transfer IDamage Amp 5% → 7% - BUFF
Charge Transfer IIDamage Amp 8% → 10% - BUFF
Climb The Ladder IStats 3 → 3.5 - BUFF
Climb The Ladder IIStats 5 → 6 - BUFF
Heroic Grab BagGold 4 → 5 - BUFF
Heart of SteelHP per growth 12 → 16 - BUFF
Heart of the SwarmAlso grants 2 Tiny Duplicators · Apex Primordian AS 0.6 → 0.9 · Apex Primordian mana 30/100 → 30/90 - BUFF
Luxury SubscriptionGold per trigger 5 → 7 - BUFF
TimestreamHP per reroll 2 → 7 - BUFF
One Two ThreeNum 1-costs 1 → 2
Nerfs
- NERF
ShieldmaidenMana 10/40 → 20/50 - NERF
Self DestructSpell dmg 280/420/630 → 250/375/600 AP - NERF
Reach for the StarsSpell dmg 170/250/450 → 160/240/420 AP - NERF
Hard CommitGold per stage 4 → 3 - NERF
Hold the LineBonus AD 9% → 8% · AP 10% → 9% - NERF
Group Hug IResists 7 → 6 - NERF
Group Hug IIResists 10 → 9 - NERF
KahunahunaBonus true dmg 125% → 100% AD - NERF
Sweet TreatsHP per item 20 → 16
Removed from 2-1 pool
- REM
Mace's WillNo longer offered on 2-1 - REM
Sunfire BoardNo longer offered on 2-1 - ADJLevel Up + Upward MobilityNow mutually exclusive with Wise Spending
Items · Artifacts · Emblems
Radiant items
- BUFFRadiant Adaptive HelmNon-tank AD/AP 25 → 40 · mana regen 6 → 7
- BUFFRadiant Dragon's Claw% max HP 22% → 28%
- BUFFRadiant Guinsoo's RagebladeAS per second 14% → 16%
- NERFRadiant Gargoyle's StoneplateResists per enemy 25 → 20
- NERFRadiant Nashor's ToothOn-crit mana 8 → 6
Artifacts
- BUFFBlighting JewelMR reduction 4 → 6
- BUFFEkko's PatienceDamage Amp 40% → 45%
- BUFFLuden's TempestAD/AP 55% → 60%
- BUFFYasuo's BladeworkAS 10% → 20%
Emblems
- BUFFArbiterAS 20% → 30%
- ADJ
Meeple1 Mana Regen per Meep → 50 HP + 4% Damage Amp per Meep - NERF
RogueOmnivamp 40% → 25%
Bug fixes13
- Nunu and Willump rare revive during combat fixed
- Pengu's Blessing tooltip: Morgana no longer shows as 5-cost
- Master Yi dash now targets the correct enemy
- Tocker's Trials: Timebreaker tooltip corrected
- Dark Star (6) mini Black Holes no longer benefit from Exiles & Two Tanky
- Luden's Tempest tooltip corrected
- Loot Singularity properly disabled in Tocker's Trials
- Soraka's Miracle now functions with multiple copies on one champion
- Soraka's Miracle champion heal waits for current heal to finish before retriggering
- Samira passive no longer over-triggers against CC-immune targets
- Realm of the Gods: Double Up cannon no longer disappears after rounds
- Boxing Lessons HP update bug fixed
- Steamroll+ now properly grants 1 gold per win