Hearthpwn

This deck is trash i cant win, u lose against shaman priest warrior even rogue is faster 

Look at previos comms, others can win)

1st Time legend after 6 years, just hit rank 3 in year 2015 with warlock in old rank system
try it out, i have no stats tracker but more win than lose=legend
playtime today from rank 5 1 star 2:30hours
sometimes very unlucky
sry for my bad english, peace.

Great deck and very fast! I should hit legend yesterday, but i do one mistake :/ I hit legend today and this is second legend in my life. :)  First was with even shaman 2 years ago :D

I start from gold  9 with this deck, 125 games 62% winrate :)

Edit: I use Dragonbane and Teron Gorefiend for 2 x Jungle Panther 

Edit 2: Knife Vendor win me a lot games as finisher and also draw me one game, very good card :)

What can you say about Teron Gorefiend? How much games did he win for you?)

And my congrats for the sencond legend of course) 

Its just solid card, mostly i do combo in turn 5 with hero power. First activate Toxic Reinforcements  and  Teron Gorefiend follow up :) after this if you have only him on board with Pack Tactics you can have two Terons with pack of gnomes inside :D

Sounds powerful)

The deck can be good, but there are a few cards which I havent had any noteworthy moments in ~50 games.

I.e. Unleash the Hounds only had potential good turns, when I had lethal anyway, or when I didn't have it on hand. Most of the time it was simply a dead card, or a tool to activate Kill Command.

Same with Timber Wolf. The combo was just never possible in my ~50 games.

Knife Vendor was rarely good, but bringing both players down by 4 hp and forcing them to use a few mana is often slightly advantageous... Often the 4 mana card is awkward to play, though.

And even though Phase Stalker is such a strong card, it rarely made much of an impact... usually it pulled the wrong secret at turn 4 and it didn't make much of a difference... or I was already beating own on them relentlessly. When you are ahead, you get a tiny bit more ahead, if you are behind, you stay behind... except if the stars align and an aggro deck has many <2 health minion on the board and can't save them with a buff minion.

Pack Tactics only gets triggered, when the other player can clear the 3/3 version...

The biggest advantage of this deck is that the games are fast, as long the other player doesn't take 1 min per turn.

I'll comment your tips in order:

Unleash the Hounds is a good situational card agains board-depended decks and a tool to activate Kill Command for other matchups. I can agree, that in legend it works worse (for me) because of big amout of control decks there. If you have the same situation, it's ok to do some replaces.

Knife Vendor is a definitely good card to finish game or to play on 6 turn with hero power (not in turn 4)

Phase Stalker is also definitely good, because it does very big overvalue (no matter what secret it pulls) in early game

Pack Tactics in this deck has the role of second type secret (for synergy with phase stalker). It can also deal extra damage in good situations.

This deck has been working for me. The games are often close but usually you can finish it. It's just trying to do as much damage per mana spent and doing so as reliably as possible. And there isn't a lot of healing in the meta right now apparently, otherwise it wouldn't get there fast enough.

Would it be any good to have 1x Knife Vendor  for  1x Nine Lives ?

Also, I can't say it's a good idea because I didn't test but maybe Mok'Nathal Lion for a single or a double change 

has synergy with leppers/sandtrooper and also is a beast.

 Ok rush it's not ideal, but even suicide may enable enough damage to a random taunt or trigger deathrattle damage,  sounds a bit tricky and the vendor is sure to damage but it may be worth trying.

edit: someone asked the same and I'm having a bit of  trouble with him too

I thought about Mok'Nathal Lion, but decided that it's too slow and situable (it have less value without leper gnomes and sandtroopers on a board). Nine Lives is pretty slow too, on 3-rd turn usually you don't have died leper gnome or sandtrooper. In this case Teron Gorefiend much better, it can resummon leper gnomes after completed Toxic Reinforcements.

what about Garrison Commander?

Garrison Commander is not in standart, so…

I think, there are a lot of good cards for face hunter in wild except him.

what's a standart?

'Standart' is the standart set of cards (not wild set)

when the card art shows someone standing

Oh, sry, I've got that I've mistaken. It's because russian equivalent of 'standard' ends with 't'

Wow ! Very cheap indeed, and I'm a very hard to please in lists of this site, many bait decks.
Not This one - Congratulations. *I'm already legend, but it does miracles in there too*