| champion | Ambessa | nerf | Passive damage 5-30 (+25% bonus AD) → 5-25 (+20% bonus AD) | 26.20 | notes |
| champion | Ashe | nerf | AD per level 3.5 → 3 | 26.20 | notes |
| champion | Cassiopeia | nerf | Base health 630 → 610; base mana 480 → 450 | 26.20 | notes |
| champion | Diana | buff | W shield bonus health ratio 11% → 14% | 26.20 | notes |
| champion | Kennen | buff | E bonus attack speed 40/50/60/70/80% → 50/60/70/80/90% | 26.20 | notes |
| champion | Kindred | buff | W monster mod 150% → 165%; E slow 1s → 1.5s; E no longer targets small monsters | 26.20 | notes |
| champion | K'Sante | nerf | W mana cost 40/45/50/55/60 → 45/50/55/60/65; W damage reduction 30/75% → 25/70% | 26.20 | notes |
| champion | Lillia | buff | R sleep duration 2.5s → 2.5/2.75/3s | 26.20 | notes |
| champion | Lucian | buff | AD per level 2.5 → 2.9 | 26.20 | notes |
| champion | Mordekaiser | buff | Q level 10-20 scaling +5/lvl to +7/lvl; R cooldown 140/120/100s → 120/110/100s | 26.20 | notes |
| champion | Neeko | buff | E base damage 70/105/140/175/210 → 80/115/150/185/220 (+65% AP unchanged); empowered root 1.8/2.1/2.4/2.7/3s → 2/2.25/2.5/2.75/3s | 26.20 | notes |
| champion | Smolder | buff | Passive Super Scorcher bonus magic damage 25-55% (+0-9% with IE) → 25-60% (+0-10.5% with IE); Flap Flap Flap 8-12.8% (+0-1.44% with IE) → 8-14% (+0-1.8% with IE); R self heal 100/135/170 (+50% bonus AD) → 100/175/250 (+75% bonus AD) | 26.20 | notes |
| champion | Swain | buff | Base MR 31 → 34; base armor 25 → 23; W damage 70/105/140/175/210 → 70/115/160/205/250 (+60% AP unchanged); W cooldown 22/21/20/19/18s → 20/19/18/17/16s | 26.20 | notes |
| champion | Tahm Kench | buff | Q base healing 10/13.75/17.5/21.25/25 → 10/20/30/40/50 | 26.20 | notes |
| champion | Vayne | buff | Health regen 4 + 0.5/level to 5.5 + 0.4/level per 5s; Q mana cost 46/42/38/34/30 → 30 at all ranks | 26.20 | notes |
| champion | Yunara | nerf | Q passive on-hit damage 5/10/15/20/25 (+20% AP) → 3/8/13/18/23 (+20% AP); W slow no longer stacks with other slows | 26.20 | notes |
| item | Experimental Hexplate | nerf | Ranged modifier 70% of value (35% attack speed, 14% move speed) → 50% of value (25% attack speed, 10% move speed) | 26.20 | notes |
| item | Hextech Rocketbelt | rework | Ability haste 20 → 10; active damage 100 (+10% AP) → 135 (+15% AP) | 26.20 | notes |
| item | Runaan's Hurricane | nerf | Attack damage per bolt 65% → 60% | 26.20 | notes |
| champion | Aatrox | buff | W cooldown 20/18/16/14/12s → 18/16.5/15/13.5/12s; E heal ratio 1.1% → 1.3% per 100 bonus health | 26.19 | notes |
| champion | Aphelios | buff | Calibrum Moonshot damage 70-160 → 80-170; Severum healing 2-7.1% / 5-17.75% → 2-8% / 5-20%; Gravitum slow decays → 15% instead of 10%; Infernum Duskwave cooldown 9/8.25/7.5/6.75/6s → 8/7.25/6.5/5.75/5s; Crescendum mini-chakram 15% AD to 16% AD, minimum at 9th+ chakram instead of 8th+ | 26.19 | notes |
| champion | Aurora | buff | E base damage 70/110/150/190/230 → 80/120/160/200/240; R rift duration 1.75/2.5/3.25s → 2.25/2.75/3.25s | 26.19 | notes |
| champion | Draven | buff | Base AD 62 → 64 | 26.19 | notes |
| champion | Elise | buff | Passive on-hit magic damage 12/22/32/42 → 14/24/34/44; W bonus attack speed 60/75/90/105/120% → 70/85/100/115/130% | 26.19 | notes |
| champion | Fiora | buff | Health growth 99 → 105; R heal range 550 → 600; R heal per tick 18.75/25/31.25 (+15% bonus AD) → 20/26.25/32.5 (+17.5% bonus AD); R max heal 375/500/625 (+300% bonus AD) → 400/525/650 (+350% bonus AD) | 26.19 | notes |
| champion | Kha'Zix | buff | Passive damage 17-136 → 22-141 (+50% bonus AD); evolved W slow 2s → 2.25s; evolved E range bonus +200 to +300 | 26.19 | notes |
| champion | Lillia | buff | Base armor 22 → 24; R sleep duration 2s → 2.5s | 26.19 | notes |
| champion | Lucian | adjust | Passive Vigilance empowered on-hit damage 15 (+20% AD) → 5 (+15% AD); Q base damage 80/115/150/185/220 → 90/130/170/210/250 (+100% bonus AD unchanged) | 26.19 | notes |
| champion | Master Yi | buff | Q cooldown refund on hit -1 second scaling down with ability haste to flat 1 second | 26.19 | notes |
| champion | Nasus | nerf | Q bonus damage 40/60/80/100/120 → 30/50/70/90/110 | 26.19 | notes |
| champion | Nocturne | nerf | R cooldown 140/115/90s → 160/130/100s | 26.19 | notes |
| champion | Poppy | nerf | Q minion/monster max health cap 85/120/155/190/225 → 70/105/140/175/210 | 26.19 | notes |
| champion | Rumble | nerf | Passive overheat attack speed 50-130% → 30-100%; passive monster cap 65-150 → 90-175 | 26.19 | notes |
| champion | Ryze | nerf | Armor growth 4.2 → 4.7; Q Flux bonus damage 25/50/75/100% → 15/40/65/90%; E mana cost 35/45/55/65/75 → 40/50/60/70/80 | 26.19 | notes |
| champion | Vi | nerf | Base AD 63 + 3.5/level to 61 + 3.9/level; passive shield 12% → 10% max health | 26.19 | notes |
| champion | Volibear | buff | Passive attack speed per stack 5% (+3% per 100 AP) → 5% (+4% per 100 AP); passive lightning on-hit damage gains +20% bonus AD | 26.19 | notes |
| item | World Atlas | adjust | Health 30 → 0; base health regeneration 25% → 50% | 26.19 | notes |
| item | Runic Compass | adjust | Health 100 → 60; base health regeneration 50% → 75% | 26.19 | notes |
| system | Teleport (top role quest) | buff | Top role quest free Teleport cooldown 420s → 390s; top role quest upgraded Unleashed Teleport cooldown 330-240s → 300-210s; non-top Unleashed Teleport unchanged | 26.19 | notes |
| champion | Bard | nerf | Base armor 34 + 5/level to 32 + 4.7/level | 26.18 | notes |
| champion | Cassiopeia | adjust | Passive move speed 6-40% → 5-36%; Q damage 75/110/145/180/215 → 65/100/135/170/205, AP ratio 65% → 75%; E mana 40 → 45, base AP ratio 10% → 20%, enhanced AP ratio 55% → 45%, damage 52-120 → 50-120; R damage 150/250/350 → 125/225/325, AP ratio 50% → 75% | 26.18 | notes |
| champion | Ekko | buff | Q mana cost 50/60/70/80/90 → 40/50/60/70/80; Q return damage AP ratio 60% → 70% | 26.18 | notes |
| champion | Kassadin | buff | Q AP ratio 70% → 80%; R base damage 70/90/110 → 80/95/110 | 26.18 | notes |
| champion | Master Yi | buff | Armor growth 4.5 → 5 per level; R move speed 35/45/55% → 40/50/60% | 26.18 | notes |
| champion | Nautilus | nerf | Base AD 61 → 58 (+3.3/level unchanged); Q damage 85/130/175/220/265 → 85/125/165/205/245 (+90% AP unchanged) | 26.18 | notes |
| champion | Seraphine | nerf | E cooldown 11/10.5/10/9.5/9s → 11s at all ranks | 26.18 | notes |
| champion | Syndra | nerf | Passive splinter mana 20-255 → 20-199; W cooldown 12/11/10/9/8s → 13/12/11/10/9s | 26.18 | notes |
| champion | Viego | buff | AD growth 3.5 → 4; passive heal gains +2% per 500 bonus HP of target's max health | 26.18 | notes |
| champion | Zaahen | buff | Q2 damage 25/50/75/100/125 → 30/60/90/120/150 (+20/25/30/35/40% bonus AD unchanged); active Q now goes on cooldown immediately when entering Resurrection | 26.18 | notes |
| champion | Zeri | nerf | W damage ratio 120% total AD to 100% total AD; W wall damage ratio 180% total AD to 150% total AD (bases unchanged) | 26.18 | notes |
| item | Guinsoo's Rageblade | buff | Seething Strike stack duration 3s → 4s | 26.18 | notes |
| system | Baron Nashor Void Corruption | adjust | Bugfix: Baron Nashor's maximum Void Corruption stacks were higher than intended (lowered; no numbers given) | 26.18 | notes |