Magtheridon by Xero

Orb of Fel:
Agonizing Brand deals 60 immediate damage and slows the target for 30% for 0.75 seconds.

Glaive of the Pit:
Basic Attacks slow enemies hit by 10% for 1.5 seconds.

Demon Soul:
? Quest: Regeneration Globes permanently increase Magtheridon's Basic Attack damage by 1 and his maximum health by 5.
? Reward: After gathering 30 Regeneration Globes, gain an additional 10 Basic Attack damage and 100 Health.

Deep Thrust:
Glaive Thrust's range is increased by 200% but it's wind-up time is increased by 0.5 seconds. This extra time does not grant unstoppable.

Serrated Blade:
Glaive Thrust deals an additional 30% damage over 3 seconds.

Enflamed Glaive:
Glaive Thrust refreshes the duration of Agonizing Brand on enemies hit.

Chaos Nova:
Blast Nova heals Magtheridon for 0.25% of his maximum health for each enemy hit, increased to 1% from heroes hit.

Demon Blood:
While under 50% health, Health Regeneration is increased by 5.

Infused Weapon:
Cleaving Basic Attacks heal Magtheridon for 20 health for each enemy hit.

Runed Bracers:
If Glaive Thrust hits 2 heroes, 50% of it's cooldown and mana cost is refunded.

Demonskin Mark:
Agonizing Brand also reduces the target's armor by 5 for the duration.

Advantage:
Magtheridon's basic attacks deal 30% more damage to slowed targets.

Magtheridon's Gaze:
Agonizing Brand reveals the target for 5 seconds and silences for 1 second when it ends.

Wake of Darkness:
Blast Nova deals an additional 1% of the target's maximum health in damage.

Impale:
The first enemy hit by Glaive Thrust takes 200% more damage and is stunned for 0.5 seconds.

Earthshatter:
Quake deals 75% damage a second time two seconds later and silences for 0.75 seconds.

Pain, Agony:
Soulburn reapplies a new, untalented Agonizing Brand on the target.

Unstoppable Force:
Magtheridon gains an additional 10 armor and becomes Unstoppable whilst under 25% health.

Manticron:
Cooldown: 120 seconds
Upon Death, Magtheridon drops a Manticron Cube on his location with health equal to his maximum health. The cube lasts for 30 seconds and may be damaged by his allies. Upon the cube's destruction, Magtheridon revives on the spot with 50% health.