Level 1
1. Block: Periodically reduces the damage received from Hero Basic Attacks by 50%. Stores up to 2 charges.
2. Void Hunger (Q): Reduces cooldown by 2 seconds if lasts for full duration.
3. Creeping Shadow (W): Radius increases by 20%.
4. Seasoned Marksmen: For every 6 enemy Minion or Mercenary kills near your Hero, gain 1 Basic Attack damage. Hero Takedowns count as 2 Minion kills.
Level 4
1. Vampiric Assault: Basic Attacks heal for 15% of damage dealt to the primary target.
2. All Consuming Shadow (W): Regenerates 10 (+2.2 per level) health per second for each enemy in the Shroud.
3. Null Tap (E): Reduces cooldown by 4 seconds if successful.
4. Malleability (Trait): No longer receives extra damage from Shapeshifting.
Level 7
1. Backstab (Q): Siphon is 30% more effective when used from shapeshift or within one second of shapeshifting.
2. Mysterious Green Light (E): Displacement does not break shapeshifting.
3. Green Herring (Trait): Creates a Narud clone when shapeshifting.
4. The Final Assault: Basic Attacks deal 50% more damage when health is at 30% or lower.
Level 10
1. Null Zone (R): Fires a Null Zone that moves in a straight line, dealing 320 (+66 per level) damage to anything in its path.
2. Rip Field (R): Channels a destructive field that slowly expands around Narud, dealing 66 (+16 per level) damage for 8 seconds.
Level 13
1. Void Release: Damages nearby enemies for 35 (+7 per level) damage after 2 seconds a Basic Ability is used.
2. Secret Touch (Q): Casts a free Shroud when Siphoning is used.
3. Reversal (E): For 5 seconds, you can activate Displacement to switch places with your target again. If your target was killed, you will still return to the location the target was killed.
4. Spell Shield: Upon taking Ability Damage, reduce that damage and further Ability Damage by 50% for 2 seconds. Can only trigger once every 30 seconds.
Level 16
1. Leech Sphere (Q): Enemies nearby the target will also suffer the effects of Siphoning, but only at 50% effectiveness.
2. No Escape (Q): Movement speed of target is slowed by 40% for 3 seconds.
3. Lost In Transition (Trait): Recovers 10% of max health when Shapeshift is used.
4. Blood for Blood: Activate to steal 15% of a target enemy's Max Health and slow its Movement Speed by 30% for 3 seconds.
Level 20
1. Null and Void (R): Reduces the cooldown by 10 seconds for every enemy Hero hit and has 30% increased range.
2. Riptide (R): Rip Field expands faster and the edge does 100% more damage.
3. Nexus Blades: Basic attacks deal 20% more damage and slow the target for 1 second.
4. Bolt of the Storm: Activate to teleport to a nearby location.
Heroes of the Storm Build Guides
As for his trait, most players won't be fooled by an extra minion on the field especially if its moving autonomously. It is mostly supposed to be a weaker cloak, primarily making him invisible on the minimap and grant the ability to go behind enemy lines for kills. It could also be used with shroud on an enemy minion wave to disguise himself for a time.
An enemy hero attacking a gate could often and easily be eliminated by placing him on the other side where he cannot escape.
It's a cool ability but the cooldown as well as the mana cost should be increased.
Also I am not convinced of his trait but maybe I just don't get it.