Mal'Ganis by CactusJones

Tier 1

Deep Slumber-Quest! Put enemies to sleep for a total of 32 seconds.
Reward: Sleep now lasts 1 second longer and an additional stack of Devouring Plague is applied. The damage minimum is raised to 20% of max HP.
Burning Strikes-Quest! Each hero hit by Infernal Strike increases it's damage by 20, up to a maximum of 260.
Reward: After getting 120 bonus damage, the Infernal now lasts 1 second longer.
Reward: After getting 260 bonus damage, the Infernal now attacks targets for damage equal to the bonus damage acquired.
Nathrezim Armor- Quest! Each regen globe you gather increases your maximum health by 30, to a maximum of 450.
Reward: After gathering 15 globes, gain 15 Spell Armor.

Tier 2

Blazing Blow- Infernal Strike now also burns the first hero hit, slowing them by 25% and removing 8% of their maximum health over 5 seconds.
Infernal Mastery- Infernals will now priortize attacking heroes, and deal 50% more damage to them.
Leeching Haunt- Haunt now applies another stack of Devouring Plague.
Corruption Aura- Enemies nearby Mal'Ganis for more than 1 second will pulse with shadow magic, which deals 25 damage to all nearby allies every 0.5 seconds. This effect continues until they leave the range.

Tier 3

Chaos Bolt -Activate to deal 550 damage to an enemy with Devouring Plague on them after a 0.5 second cast. Can only be cast within 1.5 seconds of Infernal Strike. 20 Second Cooldown
Empowering Ritual- Activate to channel for 2.5 seconds. After you finish channeling, your next basic ability will be empowered, and apply two stacks of Devouring Plague to all targets hits. 30 second Cooldown
Empowered Felshield- Activate to become Protected for 3 Seconds, but you are unable to cast abilities during this time. 30 Second Cooldown

Tier 4

Crippling Plague
Soulstrike

Tier 5

Soulbleed- Devouring Plague lasts 1 second longer, and drains an additional 1% of HP.
Infernal Bombardment- Infernal Strike now summons 2 Infernals.
Burning Haunt- Haunt deals 100% more damage with it's initial strike, and grants 15 Spell Armor for 1.5 seconds.
Nether Soulstone- Mal'Ganis' death timer is decreased by 15 seconds, but he grants double XP when killed.

Tier 6

Dark FlameAfter casting Infernal Strike, you will become immobile for 1 second. After that 1 second, a wave of Shadows is shot back towards the charged area, stunning any enemies hit for 3 seconds.
Rapid Spooking- Haunt gains a second charge.
Felguard Protector After you drop below 50% health, you will summon a Felguard. The Felguard has 600 health and grants you 75 Armor and Spell Armor while it is alive. This effect has a 70 Second Cooldown.

Tier 7

Devastating Plague- Crippling Plague now lasts for 5 seconds, and the slow is increased to 6%.
Soul Cleave- Soulstrike gains an additional charge with a 10 second cooldown between charges. Soulstrike also reduces the Spell Armor of those hit by 25.
Vast Plague Devouring Plague now spreads amongst enemies, stacking ten times per hero.
Imp Swarm- A swarm of 4 Imps circle you, granting you one stack of Spell Armor that fully absorbs the damage of one spell. Imps respawn after 60 seconds.