Tan, the Goat Champion
http://i.imgur.com/SXppR7l.png
Tan is a goat that learned to walk on two feet. She wanders around Valoran, eating bushes. One day, she wandered into the League Headquarters building and had a chat with Ezreal.
: So, do you have what it takes to be a champion?
: Meaahh meaah.
: Alright, whatever. You're in!
: YOU HAVE MADE A GRAVE MISTAKE, MORTAL.
: Wait, you can talk?
: Meaah meahh!
: I guess I imagined it. Must be all those lonely nights, just me and my maps... 
Incidentally, this is how Ezreal's "Blue Build" was created. Anyways, once Tan had joined the League, she had to overcome many challenges. There were some that did not like her being a part of their club.
: Back in my day, they didn't allow wild animals into the League!
: Meahh meah!!!
: GANAGA BOO FFFF!
: I'm getting too old for this sh*t.
After a long while, Tan finally gathered friends, but also enemies...
: Friends/Allies
"We love Tan! She is our favorite goat champion!"
: Enemies
: A goat in the League? Not in my day!
: I know, right?
: She keeps trying to eat me!
: I thought eating my MY thing.
: She's even more bloodthirsty than me...
: Walking goat creature? CANNOT COMPUTE.
Passive: I Goat This! Tan is a very proud goat. She will always run into battle without fear. After every 3rd ability, Tan will get on four legs and her next basic attack will leap towards the target, gain increased range, bonus damage, and will knock up the targeted enemy for .5/1/1.5 seconds. While Tan is on four legs she gains increased movement speed.
Q: Goat Kick Tan kicks in the opposite direction which she is facing. This deals damage (AP .3% and 8% maximum health) to all enemies hit and slows them by 50% for 1.5/1.75/2/2.25/2.5 seconds.
W: Goat Feast/Goat Throw Passive: Tan gets hungry looking at all the bushes the League told her she couldn't eat. As time goes on, Tan gains "Hunger" stacks. Active: Tan gets hungry, so she takes a bite out of the target, stunning them for 1 second and dealing damage. At max hunger stacks, she can recast this ability on the stunned target and throw them behind her.
E: Goat Embrace Tan bleats, "Meahh meahh", and she and nearby allied champions are shielded for 1.5 seconds. After the duration of the shield, Tan is healed equal to the amount of shield that was broken.
R: You've Goat to be Kidding Me! Tan becomes the ultimate goat for 7/9/11 seconds, reducing her cooldowns by 40% (can stack with cooldown reduction) and gaining increased health (250/350/450), armor (25/35/45), and magic resist (25/35/45).