Hearthpwn

Proof:

I played this deck from rank 5 -> 3.

If you like this deck upvote so more people will have a chance to see it.

Ask me about anything and subscribe if you want to see more!
YouTube: https://www.youtube.com/c/Jeleniowatyy
Twitch: https://www.twitch.tv/jeleniowatyy

Mulligan:

always keep: Helpless Hatchling, Dire Mole or Springpaw -> Crackling Razormaw, Dire Wolf Alpha or Scavenging Hyena -> Bearshark or Animal Companion

vs aggro: Headhunter's Hatchet, Revenge of the Wild (when you already have minions to play - it helps in board control (trades) and allows you to resurrect board)

vs control: Master's Call (you can also keep it when you have good mana curve because it helps to find more steam), Deathstalker Rexxar

!cards that are mentioned first are better to keep!

!just try to play on mana curve!

Card Replacements:

Deathstalker Rexxar -> Sated Threshadon or Volcanosaur (both thing are not close in terms of power level but it's still a huge threat)

Bittertide Hydra -> Tundra Rhino (great cards because it allows you to deal more points of face dmg with other beasts and it synergies with Revenge of the Wild - me go face? yes)

Cards that might be included:

Jeweled Macaw - great 1-drop and it's another way to get a beast

Tracking - sometimes you really need specific card. For example Kill Command to finish off the opponent or Deathstalker Rexxar against control deck.  

Hunter's Mark - might help against big taunt minions. That's the only option because we cant include Spellbreaker (it's not a beast)

Unleash the Hounds - synergies with scavenig hyena and helps against decks that creates wide board

Vicious Fledgling - decent stats, hit your opponents face once (pray to RNGesus to get windfury) -> profit

Stranglethorn Tiger - it will survive almost every board clear. It's means that you have guaranteed 5 points of face dmg (taunt is cheat)

Why this deck is so powerful?

It's a consistent deck with super powerful mana curve. If you don't know what to do just go face ... but seriously there are a lot of great synergies that make this deck great. Not only early game is the strongest thing about this deck, but we also have a lot of threats for a mid game (Savannah Highmane, Bittertide Hydra - can be discounted with Helpless Hatchling) we also shouldn't run out of steam thanks to Master's Call or Deathstalker Rexxar (it helps a lot against control match-ups). When you will be forced to trade you can resurrect your minions with Revenge of the Wild (it's even better with rush or charge minions because you can attack once again)