League of Legends patch 25.12 notes: Garen adjustments, Rumble nerfs, and more

The League of Legends patch 25.12 notes were revealed on June 11, 2025. Most of the updates are primarily focused on pro-skewed balance changes, as the Mid-Season Invitational 2025 (MSI) is approaching. Champions such as Taliyah, Neeko, Rumble, and more have been nerfed. Meanwhile, Aphelios, Bard, and Lee Sin will be significantly buffed to create a more strategically diverse meta for MSI.

Here are the details concerning the changes made in League of Legends patch 25.12.

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Champion buffs in League of Legends patch 25.12

All adjustments in League of Legends patch 25.12 (Image via Riot Games)

1) Aatrox

Passive - Deathbringer Stance

• Healing Ratio vs Champions: 80% ⇒ 100%
• Healing Ratio vs Minions: 20% ⇒ 25%

E - Umbral Dash

• Champion Damage Healing Ratio: 16% (+0.9% per 100 bonus HP) ⇒ 16% (+1.1% per 100 bonus HP)

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2) Aphelios

Base Stats

• Level 1 Attack Speed: 0.640 ⇒ 0.665

Severum

• Onslaught Movement Speed: 20% ⇒ 25%

Calibrum

• Moonshot Damage: 60-160 (+42-60% bonus AD) ⇒ 70-160 (+42-60% bonus AD)

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3) Aurora

Base Stats

• Base Magic Resistance: 30 ⇒ 32

R - Between Worlds

• Damage: 175 / 275 / 375 (+60% AP) ⇒ 175 / 275 / 375 (+70% AP)

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4) Bard

Base Stats

• Base Movement Speed: 330 ⇒ 335

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5) Bel'Veth

R - Endless Banquet

• Cast Range: 275 ⇒ 175 / 275 / 375 / 450 (matches E attack range)

Bugfix

• Bugfix: Casting R no longer locks Bel’Veth out of non-Flash summoner's spells

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6) Garen

E - Judgment

• Damage: 4 / 8 / 12 / 16 / 20 (+36 / 38 / 40 / 42 / 44% AD) ⇒ 4 / 7 / 10 / 13 / 16 (+36 / 39 / 42 / 45 / 48% AD) (Note: This will be a buff after 100 total AD)
• Bugfix: Armor shred is now properly extended by additional spins instead of occasionally failing to stack up when the remaining duration is low

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7) Jax

Passive - Relentless Assault

• Bonus Attack Speed per Stack: 3.5 / 5 / 6.5 / 8 / 9.5 / 11% (based on level) ⇒ 5 / 6.5 / 8 / 9.5 / 11 / 12.5% (based on level)

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8) LeBlanc

E - Ethereal Chains

• Damage: 80 / 120 / 160 / 200 / 240 (+80% AP) ⇒ 80 / 120 / 160 / 200 / 240 (+85% AP)

R - Mimic

• Cooldown: 50 / 40 / 30 ⇒ 45 / 35 / 25

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9) Lee Sin

E - Tempest / Cripple

• Cooldown: 9 ⇒ 8 seconds
• Slow Amount: 20 / 35 / 50 / 65 / 80% ⇒ 35 / 45 / 55 / 65 / 75%

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10) Mordekaiser

Q - Obliterate

• Damage: 0–45 (based on level) (+80 / 110 / 140 / 170 / 200) (+70% AP) ⇒ 0–45 (based on level) (+80 / 115 / 150 / 185 / 220) (+70% AP)

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11) Nidalee

E - Swipe (Cougar Form)

• Damage: 70 / 130 / 190 / 250 (+ 70% bonus AD) (+ 40% AP) ⇒ 70 / 130 / 190 / 250 (+ 70% bonus AD) (+ 55% AP)

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12) Samira

Passive - Daredevil Impulse

• Style Bonus Movement Speed per Stack: 2 / 2.5 / 3 / 3.5% (max stacks: 12 / 15 / 18 / 21%) ⇒ 2.75 / 3 / 3.25 / 3.5% (max stacks: 16.5 / 18 / 19.5 / 21%)

Q - Flair

• Damage: 0 / 5 / 10 / 15 / 20 (+95 / 102.5 / 110 / 117.5 / 125% AD) ⇒ 5 / 10 / 15 / 20 / 25 (+95 / 102.5 / 110 / 117.5 / 125% AD)

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13) Twisted Fate

E - Stacked Deck

• Bonus Attack Speed: 10 / 20 / 30 / 40 / 50% ⇒ 15 / 25 / 35 / 45 / 55%

R - Destiny

• Cooldown: 180 / 150 / 120 ⇒ 160 / 130 / 100 seconds

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14) Zeri

R - Lightning Crash

• Damage: 175 / 275 / 375 (+ 85% bonus AD) (+ 110% AP) ⇒ 200 / 300 / 400 (+100% bonus AD) (+110% AP)
• Chain Lightning Damage: 30% AD ⇒ 40% AD

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Champion nerfs in League of Legends patch 25.12

1) Ahri

E - Charm

• Charm Duration: 1.2 / 1.4 / 1.6 / 1.8 / 2 ⇒ 1.2 / 1.35 / 1.5 / 1.65 / 1.8

R - Spirit Rush

• Cooldown: 130 / 115 / 100 ⇒ 140 / 120 / 100

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2) Azir

Base Stats

• Movement Speed: 335 ⇒ 330
• Attack Speed per Level: 6% ⇒ 5.5%

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3) Gwen

Base Stats

• Base Health: 620 ⇒ 600

W - Hallowed Mist

• Cooldown: 22 / 21 / 20 / 19 / 18 ⇒ 24 / 22.5 / 21 / 19.5 / 18 seconds

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4) Kalista

Base Stats

• Base Health: 580 ⇒ 560

Q - Pierce

• Cooldown: 8 ⇒ 9 seconds

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5) Neeko

Q - Blooming Burst

• Damage: 80 / 125 / 170 / 215 / 260 (+50% AP) ⇒ 60 / 110 / 160 / 210 / 260 (+60% AP)

W - Shapesplitter

• Bonus Magic Damage: 40 / 75 / 110 / 145 / 180 ⇒ 30 / 65 / 100 / 135 / 170

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6) Rumble

Q - Flamesplitter

• Total Magic Damage: 60 / 90 / 120 / 150 / 180 (+ 110% AP) (+ 6 / 7 / 8 / 9 / 10% of target's maximum health) ⇒ 60 / 90 / 120 / 150 / 180 (+ 110% AP) (+ 6 / 6.5 / 7 / 7.5 / 8% of target's maximum health)

E - Electro Harpoon

• Slow: 15 / 20 / 25 / 30 / 35% ⇒ 10 / 15 / 20 / 25 / 30%
• Enhanced Slow: 22.5 / 30 / 37.5 / 45 / 52.5% ⇒ 15 / 22.5 / 30 / 37.5 / 45%

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7) Senna

Passive - Absolution

• Soul Drop Chance per Minion Kill: 14% ⇒ 10%

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8) Shen

E - Shadow Dash

• Damage: 60 / 85 / 110 / 135 / 160 (+15% bonus HP) ⇒ 60 / 85 / 110 / 135 / 160 (+11% bonus HP)

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9) Taliyah

Base Stats

• Base Magic Resist: 30 ⇒ 28

Q - Threaded Volley

• Empowered Damage: 190% ⇒ 180%

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10) Varus

Base Stats

• Base Armor: 27 ⇒ 24

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11) Yorick

Passive - Shepard of Souls

• Mist Walker Attack Speed: 0.5 (+100% of Yorick’s bonus attack speed) ⇒ 0.5 (+8-80% attack speed)

Q - Last Rites

• Damage: 30 / 55 / 80 / 105 / 130 (+50% AD) ⇒ 30 / 50 / 70 / 90 / 110 (+50% AD)

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Champion adjustments in League of Legends patch 25.12

1) Rammus

Base Stats

• Base Armor: 40 ⇒ 35
• Armor Growth: 5.5 ⇒ 4.5
• Level 1 Attack Speed: 0.656 ⇒ 0.7
• Base Attack Damage: 55 ⇒ 65

Passive - Spiked Shell

• REMOVED: Rammus’ basic attacks no longer gain 10 (+10%) armor (increased by 50% during W) magic damage on hit
• NEW: Rammus now gains 15% of his total Armor and Magic Resist as bonus AD

Q - Powerball

• Damage: 80 / 110 / 140 / 170 / 200 ⇒ 80 / 120 / 160 / 200 / 240
• Smooth Moves: Powerball no longer locks Rammus out of casting his E for ~0.375 seconds after colliding with an enemy

W - Defensive Ball Curl

• Duration: 6 ⇒ 7 seconds
• Duration on Basic Attack: W’s duration is no longer increased on basic attacks
• Bonus Armor: 40 (+35 / 45 / 55 / 65 / 75% total armor) ⇒ 27 (+30 / 37.5 / 45 / 42.5 / 60% total armor)
• Bonus Magic Resistance: 10 (+30 / 35 / 40 / 45 / 50% total magic resistance) ⇒ 27 (+30 / 37.5 / 45 / 42.5 / 60% total magic resistance)
• Reflected Damage: 15 (+15% of total armor) ⇒ 15 (+10% of total armor) (+10% of total magic resistance)
• Dragon Damage: Rammus’ W now properly reflects damage from Dragon’s basic attacks (same for Thornmail)
• Tooltip Improvements: W’s tooltip now more clearly states how much Armor and MR will be gained from the ability
• Tooltip Improvements: W’s tooltip is no longer blank when the ability is active and will now show the amount of damage returned

E - Frenzying Taunt

• Attack Speed: E no longer provides Rammus with 20 / 25 / 30 / 35 / 40% bonus attack speed.
• Damage to Monsters: E now deals 80 / 100 / 120 / 140 / 160 (+70% AP) to monsters on cast (Note: This ability does not deal damage to champions)

R - Soaring Slam

• Cooldown: 90 ⇒ 120/105/90 seconds
• Initial Damage: 100 / 175 / 250 (+60% AP) ⇒ 150/ 250 / 350 (+60% AP)
• Epicenter Damage: R no longer deals 50% bonus damage at the center of the impact
• Aftershock Damage Removed: R no longer deals 20 / 30 / 40 (+10% AP) damage on aftershocks
• Slow: 15 / 17.5 / 20% per stack, up to 60 / 70 / 80% ⇒ 30 / 40 / 50%, no longer stacks
• QoL Improvement: Rammus can now Powerball soar even if Rammus is on top of an enemy if Soaring Slam is cast quickly enough
• QoL Improvement: Re-timed R’s animation to play the full animation over the dash
• Bugfix: R No longer breaks its animation and fails to deliver Powerball if they are cast too quickly together
• Bugfix: Fixed a bug where R’s animation bugged out at short ranges

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2) Vi

W - Denting Blows

• Target Max Health Damage: 4 / 5.5 / 7 / 8.5 / 10% (+2.857% bonus AD) ⇒ 4 / 5 / 6 / 7 / 8 (+3.5% bonus AD)
• Bonus Attack Speed: 30 / 37.5 / 45 / 52.5 / 60% ⇒ 30 / 35 / 40 / 45 / 50%

E - Relentless Force

• Bonus Damage: 0 / 15 / 30 / 45 / 60 (+120% AD) (+100% AP) ⇒ 10 / 30 / 50 / 70 / 90 (+110% AD) (+100% AP)

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System changes in League of Legends patch 25.12

1) Grasp of the Undying (Rune)

• Ranged Effectiveness: 60% ⇒ 40%

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2) Atakhan

• Atakhan’s spawn logic is being back to the old system to make top lane vs bot lane spawns more equitable, as he currently spawns too often in bot lane relative to the top.

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3) Dragon

• Dragon Hits: All dragon basic attacks now trigger on-hit events (e.g. Thornmail, Defensive Ball Curl)
• Dragon Dodges: All dragon basic attacks now respect dodge

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That covers the League of Legends patch 25.12 released on June 11, 2025.

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