Garrosh Hellscream by TheLaw316

As Garrosh takes damage, his Corruption meter begins to fill. Each percentage of life he is missing gives him 2% corruption, filling when he is at half health. Corruption increases all damage he does by 1% per 5 corruption and his movement speed by 1% per 10 corruption. Corruption fades as his life replenishes.

Talents:
Level 1: Increases damage at max corruption to 25%.
Level 16: Increases corruption gain to 3% per missing health.

Deals 125 (+30 per level) damage to enemies over 3 seconds. Garrosh loses 5% life per second channeled. 3 second cooldown that begins when the channeling stops.

Talents:
Level 1: increase duration by 1 second.
Level 13: every 3 minions and each mercenary or hero hit spawns a Sha-ling. Sha-lings attack the next enemy, preferring heroes over any other target.
Level 13: increases life loss to 8% per second.
Level 16: enemies hit by Whirling Corruption now gain one stack of Despair, slowing them by 10% and dealing light damage over time.

Garrosh lets out a battlecry, empowering all minions and mercenaries around him with 10% health, damage, and attack speed for 10 seconds. 15 second cooldown. 

Talents:
Level 7: Warsong now also causes 5% life loss to Garrosh.
Level 16: Increase duration and effect by 50%.

Garrosh throws Gorehowl to the ground, doing 50 damage (+15 per level) around the impact point. It then pulses in an area of effect that grows in damage and size depending on his corruption level, starting at 35 (+10 per level) and increasing with more corruption. Lasts 5 seconds. 8 second cooldown. Weapon can be killed.

Talents:
Level 4: The weapon travels 50% faster and initial damage increased by 20%.
Level 13: Desecrated Weapon's area of effect starts off at maximum size.
Level 16: Desecrated Weapon explodes for 75% of the initial damage when it is killed or expires.

Garrosh gives in to his corruption, increasing his damage by 35%, speed by 20%, and empowering all abilites and his basic attack. Can only be activated at full corruption and grants a full heal when activated. Lasts 15 seconds.

Empowered Whirling Corruption: Duration doubled. Immune to crowd control during it's effect. No longer deals damage to Garrosh.

Empowered Warsong: Hellscream's Warsong now applies to Garrosh and allied heroes.

Empowered Desecrated Weapon: Now unkillable. Area of Effect increased by 40%. Does not expire until Heart of Y'shaarj does.

Basic Attack: Applies stacks of Despair to the target, doing light damage and slowing their movement speed. Stacks up to three times. If a fourth stack is applied, the target explodes, dealing the full damage of the DoT in an area of effect.

Level 20 talent:
The Cost of Greatness: Bonus damage increased to 40%, speed to 25%, and increases duration to 25 seconds. Empowered Whirling Corruption now summons 3 Sha-lings; Empowered Warsong snares enemies within range by 10%; Empowered Desecrated Weapons have unlimited duration, but can be killed after they are no longer empowered.

Summons an Iron Star in front of Garrosh, launching it in a straight line in front of him. It does minor damage and no knockback at first, but it gains speed, damage, and distance on knockback for each minion, mercenary, and hero hit. When it hits a building, it explodes, dealing the accumulated damage to everything in a 10 yard radius. 75 second cooldown.

Level 20 talent:
CRUSH THE WEAK!: Iron Star now instantly kills all minions and mercenaries it runs over and can now target heroes.