League Of Legends

Nerfs
Gragas nerf: Died of cardiac arrest, deleted from the game
Yi nerf: ran too much, knees are shot. Movement speed decreased by 20%
Sion nerf: He needs reading glasses, cryptic gaze no longer stuns.
Twisted fate nerf: Lost all his money gambling. Starting gold cost reduced to 0 from 475

Buffs
Annie buff: Ti.ts

feel free to add to list.

EDIT: Contributions to the list:

Jarvan IV buff: now the King of Demacia
Mundo removed from game: Never found again after he went where he pleased.
Rammus - still ok
Maokai, saplings grew up, Maokai now throw trees at people
nerf to Sona, Mf, Akali ...... back pain
Singed: body no longer functions after years of substance abuse. Fights on as a head in a jar, a la futurama
A south american server has been created. Morde nerfs are reverted on this server.
Zoologists will finally figure out why Tibbers in captivity refuse to mate. They're holding out for a three-way.
Amumu Nerf: Starts taking anti-depression medication, all of his ability's do NOTHING!
Gangplank removed. Tried to raise his team's morale one too many times and the bullet fell on him.
Gragas didn't die of cardiac arrest, it was totally liver failure (good point)
Pantheon nerf: Movement speed reduced by 50% and uses a wheelchair. We are left to wonder who thought falling from ridiculous heights was a good idea.
Vlad buff(nerf?): gets aids, spreads it (yes this got downvoted, but I think it's funny)
EDIT#2:
Morello retired and the game is now perfectly balanced
We still don't have a legit black champion
Xin Zhao finally finds a girl worth fighting for
Malphite: Erosion got to him, he is now a pebble.
according to his old lore yi is already the oldest man in valoran and is over 1000 years old so 20 years wont hurt him (good point)
Malzahar now summons Cho'gaths
Several different companies sue Riot for ripping off characters, Akali, Shen, Malzahar, Chogath, Xerath, Xin Zhao and several other champs removed from the game
Upon utilization of grass as a fully functional fuel source, all brush is removed from the game in demand of resources. Garen promptly retires.
trynd nerf: has died to heart attack because he is always in an endless rage
Wukong becomes human... Theory of evolution

(Not sure if its a buff or a nerf haha)

Primal Udyr just went on sale -.-

Greeting, summoners!

At Riot, we like to provide a variety of champion styles, archetypes, and roles. Sometimes, we like to release a champion with an understood, defined role (such as Graves), while with others we try to shake up the traditional roles and offer a different way to impact the game. Fizz, the Tidal Trickster, is a perfect example of this. He splashes down somewhere in the melee assassin space, but in ways that change the role a bit -- especially compared to other assassins like Akali or Talon.

Fizz is able to pressure high-value targets like an assassin, but makes frequent use of evasive abilities and favors sustained damage over burst. This creates a different sort of hit-and-run gameplay style that allows this little amphibian to dance around the battlefield, using evasion to stay alive and keep the opponent guessing.

The primary way Fizz keeps enemies on their toes is with Playful/Trickster – a stance that has him pole vault on the end of his trident and become un-targetable. Fizz can activate the ability again to move off of the trident in any direction he chooses, dealing (literally) splash damage when he lands. In this way he can dodge big spells, dodge heavy damage in teamfights, and escape for another set of attacks shortly thereafter. Proper use of Playful/Trickster rewards good reflexes and situational awareness, since it has a powerful effect and short duration. Timing is everything.

Fizz also has something else up his sleeve that’s sure to impress, and is slightly out-of-role for an assassin. He starts by tossing a seemingly-innocent fish that sticks to a target. Then, just when they think they’re safe, it’s shark time! That’s right! A giant shark erupts from the ground and chomps down on the target and nearby friends. There’s really nothing else to say about this – a giant shark eats them, and it’s awesome.

It’d been awhile since we’d done a more whimsical character with a lighthearted theme, and Fizz fits the bill just right. Offering both a unique visual style and innovative gameplay to match, Fizz should really appeal to people who want to be -- both literally and figuratively -- slippery.

I can already picture myself chasing this bugger across the map.