Baal by Da Huuuuuudge

Split Ends [Q]
Festering Appendage attacks an additional 2 targets, dealing 80% damage, but lowers the cooldown reduction of Festering Appendage attacks to 1.5 seconds.

Revel in Madness [Q]
Baal is Healed for 30 Hp whenever an Enemy is Damaged by Festering Appendages Poison. This Heal is Doubled against Heroes. Healing can stack 5 times, prioritizing Heroes.

Entropy [W]
Quest: Hitting enemy Heroes with Hoarfrost increases its damage by 1, up to 30. Impaling a hero counts as 2 stacks.
Reward: After Hitting 30 Heroes with Hoarfrost, increase its damage by an additional 20 and gain a free cast within 3 seconds of hitting at least 2 enemy Heroes.

Path of Conquest [E]
Deal 26 Damage Per Second and gain 20% increased movement speed and immunity to slow in the area effected by Path of Destruction.

Path of Corruption [E]
Deal 23 Damage Per Second and lower the Damage dealt by enemies by 20% in area effected by Path of Destruction.

Path of Chaos [E]
Deal 18 Damage Per Second and halts the duration decay of Baal's abilities and effects in the Area effected by Path of Destruction.

Burdened Corruption [Q]
Festering Appendage Slows it's hosts Attack Speed by 20% and increases the cooldown reduction from attacks against them by 0.5 second.

Crushing Grip [Q]
Applying a Festering Appendage to an Enemy Structure will not spawn tendrils. Instead, it will disable the structure for 3 seconds. Disabling effects also apply to Fountains and Gates, preventing enemies for using/passing through them.

Cold Soul [W]
Lower Spell Armor of enemies hit by Hoarfrost equal to the Slow amount applied.

Bare Flesh [D]
Destructive Strikes can now be activated. Activating Destructive Strikes will cause your next Basic Attack against a shielded or Armored target to remove all Shields/Armor from them, regardless of amount. Basic Attacks and Festering Appendage attacks against Heroes will reduce the cooldown of this ability by 1 second. Has a 40 second cooldown.

Bleeding Lash [Q]
Basic Attacks and Festering Appendage Attacks deal an additional 1% of a target's Total Hp as damage.

Unmaker [E]
Initial wave of damage also deal 5% of an enemy unit's total Hp as Damage.

Blood Mana [Active]
Cooldown: 50 seconds
Curse an enemy Hero for 3 seconds. Cursed target will take 1 damage (+4%) for each mana they spend. Does not work on enemies without mana.

Rotting Touch [D]
Destructive Strikes can now lower Armor to -10.

Unholy Infection [Q]
If a Festering Appendage is able to to consecutively attack a target 3 times, will automatically spread a Festering Appendage to them.

Piercing Chill [W]
The center of Hoarfrost will also Slow ability cooldowns by 25% for 3 seconds. Impale effect will also drop non-hero targets if it contacts a Hero, impaling them instead.

Destruction Echo [R1]
Each Enemy Hero hit by a secondary Blast lowers the cooldown of Incineration Nova by 10 seconds.

Essence of Chaos [R2]
Targets cannot receive beneficial statuses from allies while Silenced, and have healing from allies reduced by 30%.

Vile Effigy [Active]
Cooldown: 70 seconds
Activate to cause a select unit effected by Festering Appendage to become consumed by the Appendage, transforming into an immobile demon in Baal's image while the victim enters Stasis. Vile Effigy will attack nearby enemies and will mimic Baal's Basic Abilities. Effigy has 1000 Hp plus half the Hp of the target in stasis, and it's Hp decays over 16 seconds.

Wither [Active]
Cooldown: 50 seconds
For 5 seconds, Reveal a target Enemy Hero and disable all of their Talents, aside from Heroic Ability. Has a global casting Range.

Skins
Abaalration: Legendary Skin
Zerg Aberrations are simple in concept, a hulk of Biomass piloted by a Terran nervous system. However, their unstable genetic structure makes them perfect candidates for Abathur's experiments with deadly new mutations.
Details: Skin overhauled to resemble an Infested Zerg Aberration. Voice and ability animations changed to fit theme.
Festering Appendage: Barbed Spine Crawler tendril.
Hoarfrost: A volley of spines with one large spine in the center.
Path of Destruction: A wave of Broodlings that leaves behind a trail of venoumous looking Creep.
Both Heroics: Both take on a Psyonic Appearance.


Excidium Baal: Epic Skin
The body of Tal Rasha, while rotting and twisted beyond recognition, did serve as a useful vessel for Baal upon his release unto the world of Sanctuary. Now made whole by the chaotic whimsy of the Nexus, the whole of many Creations will bask in the glory of the true form of Destruction.
Details: Restored to his true form, resembles his Diablo 3 Concept Artwork. No changes to effects.

Poke Lines:
"All shall burn in the fires of destruction."

"If it isn't broke, you're doing it wrong."

"How does Diablo keep his host body so fresh and unrotten? I must ask him what his secret is."

"Do you like the new face? I had to bolt it on after the my old one rotted away, but a think I really nailed the look!"

"Wait, you mean Tyrael destroyed the Worldstone? And it ended up annihilating the entire barbarian Homeland? (Evil Laughter) Well, it appears I haven't been giving the Angels enough credit!"

"Creation is temporary. Destruction... is inevitable!"

"Even as a Prime Evil, being a middle child isn't easy. Mephisto is constantly fussing over some small detail or another, and Diablo always needs to be the center of attention."

"You think this is easy, don't you? Just wait until you face Uber Baal! Then you shall suffer!"

"Come to think of it, why did the Barbarians only leave a single old man to guard their gates?"

"A World Tree? That's a horrible idea! Trying to build any sort of protection around it would cut it off from sunlight, plus it would be impossible to transport! And don't even get me started on the whole fire-hazard issue."

Match Start: Engage
Primal Diablo: "Well, this is certainly a disturbing omen."

Butcher: "Well, if it isn't one of Diablo's pet project. Let's see if you live up to your reputation."

Tyrael: (Mocking Amusement)"Tyrael, I've heard of your work on the Worldstone after my passing, and I must say I am impressed!"

Nephalem: "So, it seems the Bastard spawn have finally begun to wriggle lose of their chains. You're welcome, by the way."

Cho'Gall/Old God: "Such destructive power lurks within you! It seems, familier..."

Junkrat: "I never expected to find a kindred spirit among a Human. Let's see if you can measure up!"

Murky: "A infant Fish-Man?! Is this another one of Lister's pranks? I thought he would have learned after the Five-Hundredth time I tore all his limbs off!"

Negative: "Hm, too weak to be of use... but I'm sure you'll at least make for a decent distraction."

Match Start: Response
Diablo: "Don't be so quick to assume allegiance, brother! I still haven't forgotten your betrayal at the Battle of the Diamond Gates."

Primal Diablo: "I sense that I already have, in a way."

Mephisto: "Enough of your idle speculation! As long as we are undivided, all shall burn beneath the standards of Hell!"

Azmodan: "Your lesser brethren are not here to protect you, Usurper! Now, bow before a true Prime Evi- wait, that girdle looks familier..."

Tyrael: "Yes, yes, I will fight. Oh, remember that time you accidentally let a half-mad drunk set me free? Ah, good times."

Cho'Gall/Old God: "Your stylings are truly inspired!"

Junkrat: "(Devious Laugh) I like this one!"

Murky: "Hm, really? (Devious Chuckle)Well, I believe I can help with that."

Negative: "Do not tax my patience, creature! You may find it to be...(menacing) Lacking!"

Abathur: "Congratulations, you've managed to be even more a bore than Mephisto."

Takedown:
Diablo: "None shall stand in the way of my conquest, not even you!"

Mephisto: "Didn't plan for that, did you?"

Azmodan: "...And that's for monopolizing the Annihilation phrase!"

Tyrael: "You couldn't protect Creation forever. No one can!"

Junkrat: "(sigh) I miss him already."

Nephalem: "Half of nothing, is still nothing!"

Assisted Takedown: "Hey! I wasn't finished with torturing that one!"