Ahri
Most of Ahri's skills descriptions have been clarified to be more understandable but there was no change to mechanics.
Amumu
Bandage Toss now scales from 70% of AP, down from 100% of AP.
Curse of the Sad Mummy now scales from 80% of AP, down from 100% of AP.
Tantrum now costs 35 Mana, down from 50 Mana.
Annie
Most of Annie's skills descriptions have been clarified to be more undestandable but there was no change to mechanics.
Brand
Pyroclasm - Pyroclasm now prioritizes champions for the next bounce instead of increasing missile speed.
Cho'gath
Magic Resist increased to 31.25 (+1.25 per level), up from 30.
Feast now has a 150 range, up from 100.
Vorpal Spikes now grow as Cho'gath grows in size.
Evelynn
Agony's Embrace now has a 120/100/80 secs cooldown, down from 150/120/90
Janna
Zephyr now scales from 60% of AP, down from 80%.
Lux
Finales Funkeln is now named Infinite Light.
Morgana
Black Shield now has a 23/21/19/17/15 secs cooldown, down from 23 secs cooldown at all ranks.
Rammus
Magic Resist increased to 31.25 (+1.25 per level), up from 30.
Twitch
Base damage increased by 52, up from 50.
Urgot
Acid Hunter now deals 10/40/70/100/130 damage (+0.85 of AD) instead of 50/80/110/140/170 damage.
Xin Zhao
Damage changed to 55.3 damage (+3.3 per level) instead of 59 (+3 per level)
Audacious Charge now deals 70/110/150/190/230 damage, down from 70/115/160/205/250 damage.
Yorick
Omen of Famine - The healing effect is halved against minions.