Patch 25.17 buffs and nerfs in the League of Legends August 27th update

Hannah Marie ZT, Senior Editor

Last Updated: 27/08/2025

League of Legends Patch 25.17 buffs and nerfs are now in action. Which Champions are currently stronger, and which are weaker in the latest update?

The August 27th Patch 25.17 buffs and nerfs are as follows:

League of Legends Patch 25.17 Buffs

Patch 25.17 has focused more on buffs over nerfs, with ten Champions receiving notable improvements. There are four notable Champion downgrades. Prior to this patch, Riot Games also released WASD controls into PBE with mixed reactions. These new Patch 25.17 buffs and nerfs can also be tested on WASD movement controls.

The most detailed buffs are to Irelia and Kog’Maw.

Most extensive Champion buffs

Irelia

W “Defiant Dance” Minimum Damage has been altered from +40% AP to +50% AP. 

Full Minimum Damage stats are now 10 / 20 / 30 / 40 / 50 (+40% AD) (+50% AP).

W “Defiant Dance” Maximum Damage has been altered from +120% AP to +150% AP. 

Full Maximum Damage stats are now 30 / 60 / 90 / 120 / 150 (+120% AD) (+150% AP).

E “Flawless Duet” has buffed cooldown. 

The original cooldowns were 16 / 15 / 14 / 13 / 12. New cooldowns for Patch 25.17 are  16 / 24.5 / 13 / 11.5 / 10.

E “Flawless Duet” has buffed damage.

The original damage was 70 / 110 / 150 / 190 / 230 (+80 AP). New damage for Patch 5.17 is 70 / 110 / 150 / 190 / 230 (+ 100% AP).

Kog’Maw

Q “Caustic Spittle” had had its damage AP increased. 

The original damage was 80 / 125 / 170 / 215 / 260 (+ 80% AP). The new damage for Patch 25.17 is 80 / 125 / 170 / 215 / 260 (+ 90% AP).

W “Bio-Arcane Barrage” has increased Damage On-Hit AP.

The original Damage On-Hit was 3 / 3.75 / 4.5 / 5.25 / 6% (+ 1% per 100 AP) target max HP. This has been updated to 3 / 3.75 / 4.5 / 5.25 / 6% (+ 1.5% per 100 AP) target max HP.

R “Living Artillery” has had its Minimum Damage improved. 

Formerly, Minimum Damage followed the progression 100 / 140 / 180 (+75% bonus AD) (+ 35% AP). In Patch 25.17, this is updated to 100 / 140 / 180 (+75% bonus AD) (+ 35 / 40 / 45% AP).

Other notable buffs include Kassadin, Kayn, Miss Fortune, Morgana, Nilah, Senna, Sett, and Vayne. 

Additional Champion buffs

Kassadin 

Q “Null Sphere” has improved damage AP. 

The original damage was 70 / 100 / 130 / 160 / 190 (+ 65% AP). New damage for Patch 25.17 is 70 / 100 / 130 / 160 / 190 (+ 70% AP).

E “Force Pulse” has improved damage AP. 

The original damage was 65 / 95 / 125 / 155 / 185 (+ 60% AP). New damage for Patch 25.17 is 65 / 95 / 125 / 155 / 185 (+ 70% AP)

Kayn 

Q “Reaping Slash” Manna Cost has been reduced from 50 to 40.

W “Blade’s Reach” Manna Cost has been reduced. 

The original Manna Cost was 60 / 65 / 70 / 75 / 80. New Manna Cost for Patch 25.17 is 40 / 45 / 50 / 55 / 60.

Miss Fortune 

Base Attack Damage has increased from 53 to 55. 

Morgana 

W “Tormented Shadow” has Manna Cost reduced from 70 / 85 / 100 / 115 / 130 to 70 / 80 / 90 / 100 / 110.

W “Tormented Shadow” also has Minimum Damage Per Second increased from 14 / 28 / 42 / 56 / 70 to 18 / 31 / 44 / 57 / 70.

Nilah 

Secondary damage to monsters on her Q, “Formless Blade,” has gone from 10% total AD to 100% total AD.

Senna 

Base Attack Speed Growth has increased from 2% to 2.6%.

Q “Piercing Darkness” healing has been altered from 40 / 55 / 70 / 85 / 100 (+ 40% bonus AD) (+ 50% AP) to 40 / 60 / 80 / 100 / 120 (+ 40% bonus AD) (+ 50% AP).

Sett

Bonus Monster Damage on E, “Facebreaker,” has increased from 100 to 125–250 (level dependent) 

Vayne 

Monster Damage for W “Silver Bolts” has increased from 6 / 7 / 8 / 9 / 10% max HP (capped at 200) to 140 / 155 / 170 / 185 / 200 damage regardless of health.

League of Legends Patch 25.17 Nerfs

Gwen 

Base Stats have been altered. Armour is reduced from 36 to 33. Attack Speed Growth is increased from 2.25% to 2.5%.

R “Needlework” has had its Initial Slow of 60% altered to 30 / 45 / 60%. Subsequent Slows are changed from 25% to 15 / 20 / 25%. 

Master Yi 

Base Health has been decreased from 669 to 655. 

Q “Alpha Strike” has had its On-Hit damage modifier reduced from 75% to 65%.

Rumble 

Rumble’s Passive “Junkyard Titan”’s Overheated damage has gone from 5-40 (+ 25% AP) + 5% target max HP to 5-40 (+ 25% AP) (+ 4% target max HP).

Q “Flamespitter” has had its Damage Over 3 Seconds altered from 60 / 90 / 120 / 150 / 180 (+ 100% AP) + 6 / 6.5 / 7 / 7.5 / 8% target max HP to 60 / 85 / 110 / 135 / 160 (+ 100% AP) + 6 / 6.5 / 7 / 7.5 / 8% target max HP. 

Singed 

Q “Poison Trail” duration has been decreased from 2.2 seconds to 2 seconds 

Maximum damage ticks per application reduced from 9 to 8.

Patch 25.17 buffs and nerfs adjacent adjustments

Alongside the Patch 25.17 buffs and nerfs, two Champions have had adjustments. Teemo’s R, “Noxious Trap,” has had its opacity altered from 30% to 50%. 

Additionally, Yunara has had five total bug fixes for Q, “Cultivation of Spirit.” These include fixing issues with items failing to do damage in Q bounces and incorrect damage reduction.  

Hannah Marie ZT, Senior Editor

Hannah is a journalist specialising in the esports, gaming, and technology sectors. Working for outlets such as Dot Esports, Esports Insider, and of course ENUK, she has developed a love for wider esports, Apex Legends, and advocating for women's esports initiatives. You may have seen her at various esports and gaming events, including ALGS LANs, ESI London, EGX, and watch parties.

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