Cassiopeia
Twin Fang cast animation sped up
Petrifying Gaze
Cast animation sped up
Cast range increased to 850 from 700 (effect now roughly matches the particle)
Damage increased to 200/325/450 from 150/275/400
Cooldown reduction with rank is now reflected in the levelup tooltip
More accurately targets enemies that move in/out of the area during the cast time

Dr. Mundo
Base health reduced to 522 from 560
Health per level reduced to 89 from 92
Sadism cooldown increased to 75 seconds from 60

Galio
Resolute Smite
Damage increased to 80/135/190/245/300 from 60/115/170/225/280
Ability power ratio increased to 0.8 from 0.75
Cooldown reduced to 7 from 8
Righteous Gust
Movespeed increased to 20/28/36/44/52 from 20/25/30/35/40
Righteous Gust now applies the movespeed buff to Galio more quickly
Damage reduced to 60/105/150/195/240 from 65/110/155/200/245

Katarina
Killer Instincts healing reduction on Bouncing Blades duration reduced to 5 from 10

Lee Sin
Sonic Wave
Base damage reduced to 50/80/110/140/170 from 60/90/120/150/180
Improved the general missile usability
Resonating Strike base damage reducedto 50/80/110/140/170 from 60/90/120/150/180
Safeguard range increased by 50
Iron Will lifesteal and spell vamp percent reduced to 5/10/15/20/25 from 10/15/20/25/30
Changes deployed in the April 5th hotfix
Sonic Wave bonus attack damage scaling increased to 1.0 from 0.8
Resonating Strike bonus attack damage scaling inceased to 1.0 from 0.8
Tempest bonus attack damage scaling inceased to 1.0 from 0.6
Dragon's Rage bonus attack damage scaling inceased to 2.0 from 1.5
Flurry passive energy gain increased to 15 from 10 per hit

Maokai
Base movespeed increased to 310 from 305
Base health per level increased to 90 from 82
Base armor per level increased to 4.0 from 3.5

Miss Fortune
Impure Shots healing reduction debuff duration reduced to 3 from 8

Nocturne
Duskbringer attack damage bonus reduced to 15/25/35/45/55 from 20/30/40/50/60
Unspeakable Horror
Cast range reduced to 475 from 500 and leash range reduced to 550 from 600
Fixed a bug where breaking the leash near the end would still trigger the fear
Fixed a bug where adding a spell shield like Banshee's Veil while Unspeakable Horror was on you would block the fear effect
Paranoia range reduced to 2000/2750/3500 from 2500/3250/4000

Renekton
Cull the Meek
Heal reduced to 5% from 7.5%
Fury heal reduced to 10% from 15%
Slice and Dice
Damage reduced to 30/60/90/120/150 from 45/75/105/135/165
Attack damage ratio increased to .9 from .6
Cooldown adjusted to 18/17/16/15/14 from 20/18/16/14/12
Dominus damage reduced to 40/70/100 from 50/75/100

Shen
Stand United shield strength reduced to 200/475/750 from 300/525/750

Singed
Insanity Potion
No longer gives attack speed or attack damage, but now gives magic resist and crowd control reduction(10%/20%/30%)

Sion
Cryptic Gaze stun duration reduced to 1.5 from 2 at all levels

Sona
Hymn of Valor mana cost reduced to 65 from 75
Aria of Perseverance mana cost reduced to 65 from 75
Song of Celerity mana cost reduced to 65 from 75

Soraka
Infuse now grants assist credit on ally cast.

Teemo
Noxious Trap
Mushroom reload time increased to 35/31/27 from 30/26/22
Damage reduced to 200/400/600 from 250/475/700
Move Quick cooldown increased to 22 seconds from 13

Tristana
Explosive Shot
Damage now applies over 5 seconds instead of 4 to 8
Total damage increased to 110/140/170/200/230 up from 100/125/150/175/200
Healing reduction duration is now a static 5 from 3 to 8

Twisted Fate
Pick a Card
Fixed a bug where Red Card would sometimes fail to damage targets that were moving away from you
Fixed a bug where Pick a Card's locked particle wouldn't show to enemies after leaving brush
Fixed a bug where Red and Gold card damage did not match the tooltip
Pick a Card now deals entirely magic damage, rather than normal physical damage plus bonus magic damage
Blue Card now restores mana equal to 50% of the damage dealt
Updated the 'Lock Card' tooltip with more detailed damage information
Destiny
Fixed a bug where Destiny would show allies it was always ready to cast, even if it wasn't
Fixed a bug where Gate's channel could be dispelled by Cleanse or Quicksilver Sash, teleporting him immediately
Fixed a bug where Destiny's duration was not being properly reflected in the tooltip (6/8/10 seconds)
Destiny now shows a buff so Twisted Fate knows how long he has to teleport

Xin'Zhao
Battle Cry duration reduced to 5 from 7
Crescent Sweep duration reduced to 6 from 8
Audacious Charge cooldown adjusted to 16/15/14/13/12 from 18/16/14/12/10

Items
Fixed a bug where a capped Leviathan was reducing true damage
Wriggle's Lantern
Combine cost increased to 150 from 75
Life Steal increased to 18% from 14%
Changed proc to magic damage from physical damage
Heart of Gold
Recipe Changed: Ruby Crystal + 350 Gold
Now gives: +250 Health +5 Gold per 5
Randuin's Omen armor reduced to 53 from 80
B.F. Sword
Attack damage reduced to 45 from 50
Gold Cost decreased by 200
Cloak Of Agility gold cost decreased by 50
Infinity Edge
Attack Damage increased to 80 from 75
Critical Strike increased to 25% from 20%
Hextech Revolver spell vamp increased to 20% from 15%
Hextech Gunblade Spellvamp increased to 25% from 20%
Will of the Ancients spellvamp increased to 25% from 20%