Abilities Overview

[Trait] Berserker
Zul’jin gains 1% Attack Speed per 1% of missing Health. 
Zul’jin can activate Berserker to increase the damage of his Basic Attacks by 25% at the cost of 2% of his maximum Health per attack.

[Q] Grievous Throw
Zul’jin throws an axe forward, dealing damage to the first 2 enemies hit and marking them for 8 seconds. Marked enemies take 50% bonus damage from Zul’jin’s next 3 Basic Attacks against them.

[W] Twin Cleave
Throw 2 axes in a large circular arc, dealing damage and slowing affected enemies by 15% per axe for 2 seconds.

[E] Regeneration
Zul’jin channels to regenerate 25% of his maximum Health over 4 seconds. Moving or taking damage while channeling will interrupt this effect.

[R1] Taz’dingo
Zul’jin is Unkillable for the next 4 seconds, and cannot be reduced to less than 1 Health. Taz’dingo!

[R2] Guillotine
Zul’jin throws a massive guillotine into the sky that crashes down on enemies in the targeted area. The lower Zul’jin’s Health, the more damage it deals.

Talents

In addition to the abilities, GosuGamers have posted a full list of Zul'jin's talents.

Level 1

[Q] Boneslicer 
Grievous Throw now pierces through enemies. Bonus damage increased by 15%.
[Passive] Arcanite Axes
Twin Cleave cooldown reduced by 0.5 seconds for every Hero hit. Ability Power is increased by 25% while below 50% Health.
[Passive] You Want Axe?
Every 5 Basic Attacks used against Heroes increases your Basic Attack damage by 1.5. Upon reaching 24 Stacks, permanently gain 20% Range.
Level 4

[E] Troll's Blood
Increases Regeneration healing by 75%.
[Passive] Let the Killing Begin
Enemies killed by you increase your attack speed by 6% for 10 seconds, stacking up to 5 times. Attacks refresh duration.
[Passive] Headhunter
[!] Quest: Kill all unique enemy Heroes. Reward: Activate to reveal all enemy Heroes for 4 seconds.
Level 7

[Q] Vicious Assault
Increases the number of charges to 6. Basic Attacks against afflicted Heroes reduces cooldown by 2 seconds.
[W] Wrong Place Wrong Time
If an enemy is hit by both axes at the same time, deal bonus damage.
[Trait] Recklessness
While below 50% health, gain 25% bonus Attack Damage.
Level 10 (Heroic Abilities)

[R1] Taz'dingo!
Cannot be reduced to less than 1 Health for the next 4 seconds.
[R2] Guillotine
Throw a massive axe into the air that crashes down on enemies, dealing damage based on how much Health you are missing.
Level 13

[Q] Eye of Zul'jin
Hitting an enemy Hero with Grievous Throw increases Movement Speed by 25% for 2 seconds.
[E] Forest Medicine
Regeneration no longer has to be channeled. Damage still breaks the heal.
[Active] Voodoo Shuffle
Activate to remove all Slow and Root effects.
Level 16

[W] Swirling Death
Axes cycle twice and can hit enemies on each revolution but cooldown is increased by 4 seconds.
[W] Lacerate
Increases Slow amount of each axe by 15%.
[Trait] Ferocity
Increases the Attack Speed bonus of Berserker by 40%.
Level 20

[R1] Amani Resilience
Restore Health equal to 50% of the damage you dealt while using Taz'dingo.
[R2] Buzzsaw
After impact, the Guillotine continues rapidly forward, dealing damage to enemies in the line.
[Active] Ensnare
Throw a net forward, rooting the first enemy hit.