Terokk by Nortin

Tier 1

Terokk's Quill - Terokk's basic attack range and the range of Terokk's Vengeance are increased by 1.5.
Beakbreaker of Terokk - Every fourth basic attack against the same target Silences them for 0.5 seconds. Terokk's Vengeance also Silences all enemies hit for 0.5 seconds.
Wingblades - Terokk has 30% increased basic attack speed and 15% reduced basic attack damage. Terokk's Vengeance now hits all enemies in a circle around Terokk.

Tier 2

Unstoppable Revenge - Terokk's Vengeance can be cast while Stunned, and deals 100% bonus damage when it is cast this way.
Tailwind - Talon Dive gains an extra charge and can now travel over terrain.
Kaliri Scout - Adds Kaliri Scout to the ability bar.

Tier 3

Protection of Anzu - Champion of the Cursed now grants 20 Armor instead of 10.
Fury of Sethe - Champion of the Cursed also grants 10% increased damage for its duration.
Glory of Rukhmar - Champion of the Cursed deals 23 (+4% per level) damage per second to nearby enemies for its duration.

Tier 4

Blessing of Anzu - See above.
Curse of Sethe - See above.

Tier 5

Unrelenting Storm - Terokk's basic attacks extend the duration of Zephyr by 0.5 seconds.
North Wind - When Terokk casts Zephyr on a target besides himself, he also casts a copy on himself.
Flying Talon Kick - Talon Dive no longer slows, but deals 200% more damage.

Tier 6

Windfury - Once every 10 seconds, Terokk's next basic attack hits twice for 80% damage. Casting an ability reduces this cooldown by 2 seconds.
Hit and Run - Talon Dive grants Terokk 15% increased movement speed and increases the damage of Terokk's Vengeance by 10% for 3 seconds for each enemy hero hit.
Shadow Scroll - Adds Shadow Scroll to the ability bar.

Tier 7

Anzu's Cunning - Blessing of Anzu now has global range. Additionally, Blessing of Anzu is automatically cast when Terokk dies.
Sethe's Hatred - While the target of Curse of Sethe is marked, they also have their Armor lowered by 25 and are Revealed.
Rukhmar's Radiance - Adds Rukhmar's Radiance to the ability bar.
Weapon Mastery - Adds an extra passive effect based on Terokk's weapon:

Terokk's Quill - Basic attacks and Terokk's Vengeance now have 2 bonus range instead of 1.5. Additionally, reduce the cooldown of Terokk's Vengeance to 4 seconds.
Beakbreaker of Terokk - Basic attacks deal 20% more damage. Terokk's Vengeance and every fourth basic attack now Stun for 0.5 seconds instead of Silencing.
Wingblades - Increase the basic attack speed bonus to 50%. Terokk's basic attacks now reduce the cooldown of all of his basic abilities by 0.5 seconds.

v1.4
-Added specific health, damage, and mana numbers; balance feedback is appreciated!
-Changed some of the design to look nicer
-Reworked Curse of Sethe to repeat damage the target takes, and reworked Sethe's Hatred accordingly
-Added the following talents: Unrelenting Storm, Flying Talon Kick
-Reworked the following talents: Tailwind, North Wind, Rukhmar's Radiance
-Removed the following talents: Deflecting Gale, Bloodthirsty, Battering Gust

v1.3
-Reworked the Beakbreaker of Terokk, Wingblades, and Weapon Mastery talents to enhance Terokk's Vengeance
-Added the Rukhmar's Radiance active talent

v1.2
-Champion of the Cursed also applies to the ally affected by crowd control
-Added the Hit and Run talent
-Reworked the following talents: Tailwind, Anzu's Cunning, Sethe's Hatred
-Removed the following talents: Swift Diver, Stasis Guard, Martyr

v1.1
-Changed some of the design to look nicer
-Lots of small balance changes
-Reworked Windfury (double attack after ability cast -> double attack on cooldown, recharged faster by ability cast)