Intro:

Hello,
first of all: english is not my mother tongue, so there will be some mistakes. Don't hesitate to tell me these mistakes, i will try to correct them .
I play DotA for 2 years now and decided to make a Guide to this new hero.

The Guide:

Watch this for detailed hero mechanism and skills.

Pros'n'Cons:

[+]high Dmg infight due Essence Shift
[+]over average MS
[+]Ultimate give near max. MS and insane HP regen
[+]still kinda overpowered
[+]great Attack Animation

[-]fragile
[-]Item dependent
[-]low stat gain
[-]can/will be nerfed

Personal comment on Skills:

Dark Pact:
The only nuke Slark got. Uses own Life to damage enemies around him. In my opinion completely useless. Why make Slark's low HP even lower? skipped

Pounce:

That's the skill that make Slark being Slark. Pouncing to the enemie and binding him to a spot. Perfect to catch an escaping hero because the escaping hero will go on running away instead of fighting back. maxed first

Essence Shift:
Slarks Passive. It drains 1 per attribute and another main attribute to give Slark 4(!) Agility Stats. The more often Slark attacks the enemy the more Damage and the more AS he gets, while the enemy losing HP, Mana and armor.

Shadow Dance:
Slarks Ultimate. When you aktivate it, it makes Slark becoming invisible, but still able to cast or attack. Can be used to irritate the enemy when attacking or to escape. The passive side of this skill make Slark getting alot of MS and high HP-regen. So you can run away when your HP is too low and run back to fight the enemie again after having full HP again.

Skill build: