Natsu: The Dragon Slayer.

Here's is a champion idea that i came up with based on the character Natsu from the show Fairy Tail.

Passive: Over time Natsu gains anger which he uses to increase the damage on his attacks. When at full anger, Natsu consumes the anger on his next basic attack to deal true damage or use an empowered ability. Flames allow Natsu to gain anger faster (Brand abilities, Dragon Attacks, etc)

Fire Dragon Iron Fist (Q): Natsu calls on with his flames from within to do an empowered auto attack. If he is at full anger, his basic will not deal true damage however it will deal 25% more damage and give a 5% slow.

Fire Dragon Roar (W): Natsu breaths fire in a cone area. The closer the enemy is to Natsu when hit with this the greater the slow.

Fire Dragon Talon (E): Natsu spins in a circle one time dealing no damage but applying an over time burn to the enemy. This will be a fairly high damage burn.

Dragon Force (R): Natsu enters the state of Dragon Force, gaining a great amount of damage and gaining full anger. Instead of all his anger being consumed on his next AA or Ability, it will drain it faster. Natsu also gains an AOE burn that damages enemies that stand in it. The longer the enemy stands in the AOE, the greater the damage output from Natsu on them will be. This AOE drains his anger quite fast and will drain slower with the higher the lever of the ability.

Let me know what you think. I don't have that many numbers in there currently but i will make an edit on it soon. Let me know what you think of it. (Yes I know this makes me seems like a fanboy)