League of Legends patch 25.17 preview: Irelia buffs, Gwen nerfs, and more

The full preview for the League of Legends patch 25.17 is now out. The Lead Gameplay Designer for LoL, Matt Leung-Harrison (@RiotPhroxzon on X), shared the upcoming adjustments of the live patch on August 20, 2025. However, Yunara is not going to get nerfed in the next update, despite being one of the most overpowered ADCs in the current meta.

Here are all of the upcoming changes shared on the League of Legends patch 25.17 preview notes.

All changes in League of Legends patch 25.17 preview

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Here are the buffs, nerfs, and adjustments mentioned in the League of Legends patch 25.17 preview:

Champion buffs

W AP ratio based on channel time: 40%-120% AP → 50%-150% AP
E CD: 16-12 → 16-10
E AP Ratio: 80% →100%

2) Kassadin

Q damage ratio: 60% → 70%
E ratio: 65% → 70%

3) Kayn

Q mana: 50 → 40
W mana: 60-80 → 40-60

4) Kog'Maw

Q ratio: 80% → 90%
W ratio: 1%/100 → 1.5%/100
R AP ratio: 35% → 35/40/45%

5) Miss Fortune

Base AD: 53 → 55

6) Morgana

W minimum 5-second damage: 70-350 → 90-350
W mana: 70-130 → 70-110

7) Nilah

Q attack splash damage to monsters: 10% → 100%

8) Senna

AS/lv: 2% → 2.6%
Q healing: 40/55/70/85/100 (+40% bonus AD) (+50% AP) → 40/60/80/100 /120 (+40% bonus AD) (+50% AP)

9) Sett

E bonus monster damage: 100 → 125-250 by champion level

10) Vayne

W monster damage: 6-10% max HP, capped at 200 → 140-200 always by rank

Also read: All LoL patch release dates in 2025

Champion nerfs

1) Gwen

Armor: 36 → 33
R Initial slow: 60% → 30/45/60%
R Subsequent slow: 25% → 15/20/25%
AS growth: 2.25% → 2.5%

2) Master Yi

HP: 669 → 655
Q on-hit ratio: 75% → 65%

3) Rumble

P max HP damage: 4% → 3%
Q damage: 60/90/120/150/180 (+100% AP) → 60/85/110/135/160 (+100% AP)

4) Singed

Poison duration: 2.2s → 2s
Max damage ticks: 9 → 8

Champion adjustments

1) Teemo

Muchroom opacity: 30% → 50% (no gameplay impact)

System changes

1) Axiom Arc

Price: 3000 → 2750

2) Horizon Focus

Price: 2800 → 2750
AP: 115 → 125

3) Profane Hydra

Price: 3200 → 2850
Attack damage: 60 → 55

The official League of Legends patch 25.17 will hit the live server on August 27, 2025.

Check out more LoL news and updates below:

About the author

Debayan is a gaming journalist and he specializes in League of Legends content but also pens game reviews for the website.
His fascination with video games began with the Fable series and to this day, he occasionally takes nostalgic strolls around the idyllic Oakvale village. If given a chance to inhabit a game world, he would eagerly jump into Cyberpunk 2077’s Night City and its neon-drenched streets.
Debayan is a big fan of T1's League of Legends team and Danish CS pro Nicolai “dev1ce” Reedtz.

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Edited by Debayan Saha