Lana'thel ( complete concept) by furynator

Lana' Thel uses blood instead for mana. Your receive blood when you attack an enemy or when you use your first ability. Every 20 stacks of blood increase your basic attack speed is increased by 5%. Maximum blood is 100. Each basic attack grants 3 blood

Cooldown: 6 seconds

Gain 20 blood, dealing 40 (+12/level) Stacks 2 times. On the second stack the enemy has his movement speed reduced by 15%

Target an enemy hero and release blood spheres on him. They spawn above your head and start moving towards the enemy for 4 seconds. If they dont reach their target they explode dealing AOE damage. The number of blood spheres depend on your current amount of blood.

1 sphere if you have more than 20 blood and less than 40.

2 spheres if you have more than 40 blood and less than 60 

3 spheres if you have more than 60 blood and less than 80

Imbue your blade with blood. While imbued your basic attacks deal 10% more damage. Your auto attacks now costs 8 blood.

Cost: 90 blood

Cooldown: 90 seconds

Give a friendly hero your favor. While he has your favor that hero deals 30% more damage and their attack speed is increased by 25%. Lana'thel receives 10% of the damage that the hero receives. You need to be close to the hero. Lasts 5 seconds

Cost: 80 Blood

Cooldown 100 seconds

Summon a maelstorm on the ground. Every enemy inside it is damaged for 10% of their 
current health every 2 seconds. The maelstorm draws every enemy who is in it to its center. Lasts 6 seconds