"Full 13.15 Preview
We're still getting fine tuning on the summon champion changes, but the intent is to reduce the effectiveness of smite on them and decrease their durability respectively. Meaning that instead of only junglers being able to deal with the pets, most champs will" - https://twitter.com/RiotPhroxzon/status/1684030636900884480
>>> Champion Buffs <<<
Caitlyn
[P] Headshot Critical Strike Chance ratio increased 120% >>> 130%
[R] Ace in the Hole Critical Strike Chance ratio increased 2.5% per 10% >>> 3.5% per 10% Critical Strike Chance
Camille
AD per level increased 3.5 >>> 3.8
[R] The Hextech Ultimatum bonus magic damage on-hit increased 5/10/15 >>> 20/30/40
Gwen
Base HP regeneration increased 8.5 >>> 9
[W] Hallowed Mist resistances increased 17/19/21/23/25 >>> 22/24/26/28/30
Nami
[P] Surging Tides Move Speed increased 90 (+20% AP) >>> 100 (+25% AP)
[Q] Aqua Prison damage increased 75/130/185/240/295 >>> 90/145/200/255/310
Taliyah
[Q] Threaded Volley damage increased 45/65/85/105/125 >>> 50/70/90/110/130
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[E] Unraveled Earth buffs:
- Cooldown reduced 18/17/16/15/14 >>> 16/15.5/15/14.5/14 seconds
- Monster damage ratio increased 150% >>> 175%
Yasuo
- [P-Resolve] Way of the Wanderer shield scaling adjusted to +30 at level 3, +75 at level 6, +125 at level 9, +79 at level 16 (shield value is the same at 125-600)
Yone
- [W] Spirit Cleave shield increased 45-65 >>> 55-75 (based on level)
>>> Champion Nerfs <<<
Aatrox
- [Q] The Darkin Blade AD ratio reduced 60/70/80/90/100% >>> 60/67.5/75/82.5/90%
Ivern - PBE, subject to change
- Base Magic Resistance reduced 32 >>> 30
Magic Resistance per level reduced 2.05 >>> 1.30
[W] Brushmaker ally damage increased 5/7.5/10/12.5/15 >>> 10/15/20/25/30
[E] Triggerseed shield adjusted 80/115/150/185/220 (+75% AP) >>> 85/125/165/205/245 (+50% AP)
-
[R] Daisy! adjustments:
- Duration reduced 60 >>> 45 seconds
- HP adjusted 1300/2600/3900 >>> 1000-4400 (+50 per level until 12, then +400 per level)
- Resistances adjusted 20/60/100 (+5% AP) >>> 30-90 (based on level)
- Daisy AD AP Ratio reduced 30% >>> 15%
- Shockwave rescripted so that AD nerf does not affect total shockwave damage
Kai'Sa
Base HP reduced 670 >>> 640
[Q] Icathian Rain per-missile AP ratio reduced 30% >>> 20%
[Evolved-W] Void Seeker cooldown refund reduced 77% >>> 75% (8% cooldown nerf)
Maokai
- [Q] Bramble Smash bonus monster damage reduced 100/120/140/160/180 >>> 80/100/120/140/160
Naafiri
- Missing from the list, changes possibly pulled from the patch. Comments by RiotRaptorr here.
Sejuani
- [W] Winter's Wrath total damage reduced 50/95/140/185/230 >>> 30/75/120/165/210
Shyvana
- AD per level reduced 3.4 >>> 3
- HP per level reduced 109 >>> 104
>>> Champion Adjustments <<<
Annie
- [R] Summon: Tibbers adjustments:
- HP adjusted 1300/2200/3100 (+75% AP) >>> 1150-3500 (nonlinear, based on levels 6-18) (+50% AP)
- Resistances reduced 30/60/90 (+5% AP) >>> 30-90 (based on levels 6-18)
Heimerdinger
- [R-Q] UPGRADE!!! H-28Q Apex Turret adjustments:
- HP adjusted 850-1450 (based on level 6-18) (+25-200% AP (based on levels 8-18)) >>> 725-1525 (+50% AP) (based on level 6-18)
- Resistances increased 10-80/25-65 (Armor/Magic Resistance) (based on levels 6-18/8-18) >>> 30-90 (based on level)
Rell
- Missing from the list, changes possibly pulled from the patch.
Yorick
- [R] Eulogy of the Isles Maiden of the Mist adjustments:
- HP regeneration per second added 0 >>> 2.5
- HP reduced 350/1100/3300 (+75% Yorick's tHP) >>> 400-1950 (+66-90% Yorick's tHP) (nonlinear, based on levels 6-18)
- Armor and Magic Resistance added 0 >>> 10-50 (nonlinear, based on levels 6-18)
>>> System Nerfs <<<
Glacial Augment
- Slow adjusted 30% (+3% per 100 AP) (+4% per 100 bAD) >>> 20% (+6% per 100 AP) (+7% per 100 bAD)
Night Harvester
- Soulrend will only proc on abilities, attacks, and pet damage (Luden's proc paradigm + attacks, no indirect effects)
Smite on Champion Pets
- Effects on non-lane minions changed:
- Damage reduced 600/900/1200 >>> 20-160 (based on level) to match damage to champions
- Slows 20% Move Speed for 2 seconds after unlocking Unleashed Smite