Some aoe,s , mana costs, cooldowns etc are maybe to good/bad, you judge it. Please post if you want something to change =)
Arantir, Titan of DeathI hope this coud be the model:
http://www.hiveworkshop.com/forums/models-530/chaos-knight-48233/Icon:
Health: 900
Health Regen: 8 (Higher than average)
Mana: 0
Mana Regen: 4
Move Speed: 390
Armor: 0
Damage: 60
Attack Speed: 1.6
Range: 105
Starting int: 42 (+7)
Starting str: 44 (+10)
Starting agi: 40 (+4)
Spells:

Unholy Blade (Slow Poision): Every attack made on an organic enemy unit decereases his movement speed by 30%. And if it gets attacked again in the folowing 3 seconds it will slow all units in an XXX area by 20% (no bonus to the target).

Hand of Arantir (nuke): Touches an enemy unit whit dark powers, dealing 120/140/160 damage and to all units in an XXX aoe. Cd 10, Mana cost 300, Needed levels: 2/4/6 (Animate dead target effect)

Soul Call (heal): From the graveyards bellow the ground, Arantir summons souls that clash into allies, healing 350/500/650/800 damage per target. 1 Random target recives +25/50/75/100 mana (theres no bonus mana if Arantir is alone in a 600 aoe). Mana cost 250/350/400/450, Cd 18, Needed levels: 2/4/6/8 (Possesion missle)

Deaths Shadows (ww): Arantir becomes covered in shadows, giving him +5% ms and making him invisible, lasts 40 seconds. Mana cost: 150, Cd: 170. Needed levels: 1

Song of the Dead (Unique): The dead allow Arantir to use their magic, the good or the evil ones. When used a random of 4 buffs will apear on all allys/enemys near Arantir. There are 2 positive and 2 negative buffs.
Positive: Increases damage by +35/+50 damage. Increases armor by +6/+8.
Negative: Decreases all enemy structures damage by 15%/25%. Decreases enemy attack speed by 10%/20%.
All buffs last 12/16 seconds. Mana cost: 300/350. Cd: 150/130, Needed levels: 6/9

Ancient Grave (Ulti): When activated, Arantir summons a grave that has 500 health and 30 forti armor. The grave produces an aura that forces all nearby towers to attack it. Once it dies, it add to all nearby allied units 15% evasion and +6 armor. The grave woud have 75% spell immunity and heal coud affect it. The bonus lasts 15 seconds, needs Level 12, Cd 180.
Minions

Stats:
Health - 800
Health Regen - 6
Mana - 0
Mana Regen - 3
Move speed - 390
Armor - -1
Damage - 60
Attack speed - 1.5
Range - 105
Str gain per level - 7
Agi gain per level - 6
Int gain per level - 6
Starting str - 35
Starting agi - 35
Starting int - 35
Names: Mason, Sadist, Dammned Priest, Devil Lover, Dead Demon, Hell Boy
Spells:

Dark Liquid: Normal slow poision...

Soul Blast (nuke): Summons a wave of souls that deal 100/125/150 damage in an XXX line and XXX aoe. Cd 10, Mana cost 250, Cast range XXX, Levels needed: 1/3/5

Spirit Call (heal): Minion summons souls that clash into allies, healing 250/350/450/550 damage per target. Mana cost 250/300/350/400, Cd 28, Needed levels: 2/4/6/8 (Possesion missle)

Deaths Shadows (ww): Minion gets covered in shadows, giving him +5% ms and making him invisible, lasts 5 seconds. Mana cost: 150, Cd: 180. Needed levels: 1

Soul Call (mini mini): Summons a soul from an corpse. (normal mini mini stats and normal slow poision).

Colored Red

Dark Fusion (Ulti). To cast this spell there must be atleast 3 souls (mini minis) in an 500 are near the caster. If there are then the 3 souls will die and 1 Dark Statue will be summoned (permament unit). The statue produces an +8hp and +5mp aura per second (stackable whit essence and other Statue's auras). Movement speed as normal mini mini. Cd 180, Cast time 3 secs, Mana Cost: 500, Level needed: 5, Max statues by mini is 2. Dark Statue will have Obsidan Statue model colored black, and the obsidan icon.
I think thats it... hope you like it. Some spells need balancing ( I KNOW)