Champions
Poppy, The Iron Ambassador
Devastating Blow - Poppy crushes her opponent, dealing base damage plus a flat amount and 8% of her target's max health as bonus damage. The bonus damage cannot exceed a threshold based on rank.
Paragon of Demacia - Passive: Upon being hit or attacking an enemy, Poppy's armor and damage are increased by a flat amount for 5 seconds. This effect can stack 10 times. Active: Poppy gains max stacks of Paragon of Demacia and her movement speed is increased for 5 seconds.
Heroic Charge - Poppy charges at an enemy and carries them for a short distance. The initial impact deals a small amount of damage, and if they collide with terrain, her target will take a high amount of damage and be stunned.
Diplomatic Immunity - Poppy focuses intently on a single target, dealing increased damage to them. Poppy is immune to any damage and abilities from enemies other than her target.
Valiant Fighter - Any damage dealt to Poppy that exceeds 10% of her current health is reduced by 50%.
Amumu
Bandage Toss is now directionally cast
Anivia
Frostbite range increased to 600 from 550
Glacial Storm range increased to 625 from 600
Glacial Storm cooldown increased to 10 from 6
Glacial Storm mana cost decreased to 25/35/45 from 35/50/65
Blitzcrank
Overdrive now applies additive attack and movement speed boosts rather than multiplicative
Rocket Grab pull back speed increased.
Karthus
Lay Waste range increased to 875 to 825
Lay Waste mana cost decreased to 20/28/36/44/52 from 24/32/40/48/54
Lay Waste ability power ratio increased to .35/.7 from .3/.6
Base Armor Per Level increased to 3.5 from 3.0
Kassadin
Force Pulse has a new icon
Void Stone now applies an additive attack speed boost, rather than multiplicative
Malphite
Unstoppable Force no longer affects Baron Nashor.
Master Yi
Highlander now applies an additive attack speed boost, rather than multiplicative
Highlander attack speed boost increased to 40/60/80%, from 30/50/70%
Morgana
Fixed a bug where Soul Shackle did not work on targets with CC reduction.
Increased Base Health to 403 from 387.
Increased Health Per Level to 86 from 83.
Increased Base Damage to 50 from 39.5.
Increased Base Damage Per Level to 2.8 from 2.625.
Increased Base Armor to 15 from 11.35.
Rammus
Fixed a bug where Puncturing Taunt could not be cleansed and was not reduced by effects like Mercury Treads
Singed
Insanity Potion now applies an additive attack speed boost rather than multiplicative
Tristana
Rocket Jump is now directionally cast
Udyr
Turtle Stance: Damage Absorption increased to 80 135 190 245 300 from 65 110 155 200 245.
Phoenix Stance: While Phoenix Stance's activation effect is active, Udyr's ability power is increased by 24/36/48/60/72 and attack damage is increased by 12/18/24/30/36.
Monkey's Agility: This effect will now stay stacked if you keep swapping abilities.
Cooldowns
Shared cooldown lowered from 2.5 to 1.5.
Shared ability cooldown will only apply to abilities with cooldowns less than it.
Zilean
Time Warp now applies a multiplicative movement speed slow rather than additive.
Rewind: Cooldown changed to 30/28/26/24/22 from 38/34/30/26/22.
Time Bomb:
Damage increased to 100/155/210/270/330 from 90/145/200/260/320.
Mana decreased to 60/75/90/105/120 from 70/85/100/115/130.
Time Warp: Mana cost decreased to 100 from 110 at all ranks.
Summoner Spells
Ignite
Ignite now also reduces the target's healing and regeneration by 65%
Items
Doran's Blade
Doran's blade reworked: Now gives 120 health, +6 Attack Damage and +4% Lifesteal.
Elixirs
Elixirs are no longer lost upon pseudo-death (Guardian Angel, Chronoshift, etc)
Frozen Heart
Frozen Heart upgrade cost increased to 600, from 425
Frozen Heart attack speed slow aura reduced to 20% from 25%, but applies to their total attack speed. This results in less effect against slow-attacking targets, and more effect against fast-attacking targets
Frozen Mallet
Frozen Mallet slow duration reduced to 2 sec from 2.5 sec.
Madred's Bloodrazor
Proc damage cap against monsters reduced to 120, from 180.
Proc damage cap against champions removed (used to be 180).
Spirit Visage
Upgrade cost increased to 700, from 600
Flat health regeneration reduced to 18, from 25
Now increases all healing and regeneration by 30%
Zhonya's Ring
Fixed a bug where the +25% Ability Power effect would persist after selling the item
General
Monster Sigils are no longer lost upon pseudo-death (Guardian Angel, Chronoshift, etc)