>Buffs

Corki
Base attack damage increased from 59 to 61.
Missile Barrage (R) damage increased from 80/115/150 (+15/45/75 percent AD) to 80/115/150 (+25/50/75 percent AD).
Ezreal
Essence Flux (W): Cooldown reduced from 12 to eight seconds.
Arcane Shift (E): Mana cost reduced from 90 to 70.
Lux
Base health increased from 560 to 580.
Base armor increased from 19 to 21.
Attack speed growth increased from two to three percent.
Prismatic Barrier (W): Shield strength AP bonus increased from 35 percent to 40 percent.
Naafiri
Base movement speed increased from 335 to 340.
Packmate base damage increased from 5-25 to 6-30.
Passive cooldown adjusted based on levels, from 30/25/20/15 seconds (levels 1/6/11/16) to 30/25/20/15/10 seconds (levels 1/6/9/12/15).
Zac
Passive heal per chunk increased from 4/5/6/7 to 5/6/7/8 percent.
Elastic Slingshot (E) cooldown reduced from 24/21/18/15/12 to 22/19/16/13/10 seconds.
Let’s Bounce! (R) cooldown reduced from 130/115/100 to 120/105/90 seconds.
Zed
Living Shadow (W) cooldown reduced from 20/19.25/18.5/17.75/17 to 20/19/18/17/16 seconds.
Shadow Slash (E) base damage increased from 65/85/105/125/145 to 65/90/115/140/165.
Death Mark (R) AD bonus damage increased from 65 percent to 100 percent.

>Nerfs

Aphelios
Attack damage growth reduced from three to 2.3.
Fizz
Urchin Strike (Q) AP bonus damage rediced from 55 percent to 50 percent.
Seastone Trident (W) AP active damage bonus reduced from 50 percent to 40 percent.
Gwen
Passive damage AP bonus reduced from 0.8 percent per 100 AP to 0.65 percent per 100 AP.
Kayle
Zeal stack bonus from AP reduced from one percent per 100 AP to 0.5 percent per 100 AP.
LeBlanc
“AD LeBlanc has made her return. And while the build doesn’t appear to be strictly stronger than AP LeBlanc for most players, she’s still performing too well on this build. She’s also gotten a bit weaker on her AP builds, so we’d like to return some power there in exchange.”
Attack speed ratio decreased from 0.625 to 0.4.
Attack speed growth increased from 1.5 to 2.35 percent.
Attack damage growth reduced from 2.7 to 2.2.
Sigil of Malice (Q) bonus AP damage increased from 40 percent to 45 percent.
Ethereal Chains (E) bonus AP damage increased from 35 percent to 40 percent.
Singed
Poison Trail (Q) bonus AP damage reduced from 90 percent to 80 percent.
Taric
Bastion (W) total armor reduced from 10/11/12/13/14 percent of Taric’s armor to 9/10/11/12/13 percent of Taric’s armor.
Armor growth reduced from 4.6 to 4.3.
Teemo
Blinding Dart (Q) bonus AP damage reduced from 80 percent to 70 percent.
Noxious Trap (R) bonus AP damage reduced from 55 percent to 50 percent.

>Buff

Essence Reaver
Total cost reduced from 3,000 to 2,900.
Spellblade passive damage increased from 130 percent to 140 percent of base AD.
Heartsteel
Health increased from 800 to 900.
Hubris
Eminence bonus AD per Statue Rank increased from 10 (plus one per rank) to 15 (plus two per rank).
Profane Hydra
Total cost reduced from 3,400 to 3,300 gold.
Heretical Cleave active damage increased from 80 percent AD physical damage to enemies within a 450 unit radius, increased to 120 percent AD against targets below 30 percent maximum health to 100 percent AD physical damage to enemies within a 450 unit radius, increased to 150 percent AD against targets below 50 percent maximum health.
Ravenous Hydra
Lifesteal bonus increased from 10 to 12 percent.
Cast time now references the user’s auto attack cast time.
Stridebreaker
Attack damage increased from 50 to 55.
Attack speed increased from 20 to 25 percent.
Breaking Shockwave active bonus movement speed increased from 30 percent to 35 percent (before decaying).
Tiamat
Crescent active AD damage increased from 60 to 75 percent.
Cast time now references the user’s auto attack cast time.

>Nerfs

The Collector
Total cost increased from 3,000 to 3,100.
Hextech Rocketbelt
Supersonic active base damage reduced from 175 to 125.
Stormsurge
“Stormsurge was intended to fill in a gap in the system for burst-oriented AP champions, but is both overperforming on those champions and also generically powerful for most AP champions across the board. With that said, we’re lowering the base damage and the AP ratio on the proc should reduce the most frustrating aspects of the item.”
Squall passive damage reduced from 120-260 (+40 percent AP) (melee) / 90-195 (+30 percent AP) (ranged) to 100-200 (+30 percent AP) (melee) / 75-150 (+22.5 percent AP) (ranged).
Titanic Hydra
Attack damage decreased from 55 to 50.
Health decreased from 550 to 500.
Trailblazer
Total cost increased from 2,400 to 2,500.
Health decreased from 250 to 200.