You want Fiery Bat, Huge Toad and King's Elekk in every match-up.

Keep Animal Companion, Carrion Grub, Infested Wolf or Houndmaster if you have a good curve.

Druid is a favorable match-up. The three variants of druid at this time all play very similarly. C'Thun Druid, Ramp Druid and Midrange Druid are the current variants. Against all of these you will want to keep Hunter's Mark in your starting hand. Also consider keeping Deadly Shot if you already have your early game minions in the mulligan. The general formula for this match-up is to apply pressure early on with your minions. Against C'Thun Druid, make favorable trade with your better minions. When the druid gets to their later game use Hunter's Mark and Deadly Shot to make optimal trades. Taking out a 4/6, 5/7 or 5/10 with these low cost removal spells will continually swing tempo in your direction. Remember you will not get much value off of Unleash the Hounds in this match-up. Even if there is only one minion on your opponents board, don't be afraid to use Unleash the Hounds and Hunter's Mark to kill it. You won't get value out of Unleash the Hounds any other way.

The mirror! It is all about curving out. Whomever gets the better curve wins the game. In addition, whoever has coin in my experience has a dramatically less chance of winning. It is somewhere around 30/70 if you have the coin. My suggestion is to hold onto to the coin until you can make a move that can swing the game in your favor. Otherwise you will lose.

Tempo Mage is a favored match-up. This match-up is around a 60/40. You have the ability to curve out incredibly well in this match-up. Make sure to kill any minions that they drop. Their minions can spiral very quickly. Juggling Fiery Bat on Mana Wyrm is worth it and can decide games. Eventually your minions should win-out and they will need to burn there spells to remove them instead of maintaining board presence. One thing to be careful of is not playing to much into the board. Remember on turn 7 they have Flamestrike. Play around it. Call of the Wild after a Flamestrike can often times be unanswerable by the Tempo Mage.

Freeze mage is a very favored match-up. This match-up is around a 70/30. Freeze Mage needs to have a near perfect draw to beat you. Your minions will put on to much pressure that they'll be unable to just continually control the board. Minions like Infested Wolf and Savannah Highmane will be hard for them to remove. If they do clear the board, you get minions back from them. On turn 8 and 9 you just need to double Call of the Wild to win. Even if they use Alexstraza to heal them-self. They won't be able to freeze your board afterwards. Try to keep tracking for the late game to find your Call of the Wild for lethal.

Divine Shield Aggro Paladin is an unfavored match-up. It is around a 40/60. Keep Unleash the Hounds. This match-up will largely depend on if they are able to get off a reasonable amount of divine shield minions off of their Steward of Darkshire. Unleash the Hounds is critical in this match-up. Use it to clear the board when they have it built up. Most of their minions have only 1 health and if they are without divine shields from Steward of Darkshire it can swing tempo in your favor.

N'Zoth Paladin is a even match-up. It is around a 50/50. This match-up depends on if your opponent can stabilize. Having your minions attacks reduced to 1 doesn't matter much, since they still have board presence. Infested Wolf and Savannah Highmane are sticky and hard for them to remove. The deciding factor of this match-up is if after you Call of the Wild they can board clear and Forbidden Healing. If they're unable to do this, you can normally win this match-up. 

C'Thun Priest and Control Priest are favorable match-ups. Stick to the general mulligans in this one. You want to curve out in these match-ups. What will normally happen is that they will simply run out of answers for the minions you are putting into play. Playing Savannah Highmane after Savannah Highmane will mean that they will have to have 2x Entomb to deal with them. They essentially must have the perfect answers to everything you play to win this match-up which is very hard for them to do. Call of the Wild will often times be unanswerable by Priest.

Rogue is just the ultimate counter for us. Whether it is N'Zoth, Miracle or Malygos Rogue there is absolutely nothing you can do to make this match-up favorable. Back-stab and SI:7 Agent kills your Huge Toad and King's Elekk. Carrion Grub will be slaughtered by Shadow Strike. Infested Wolf will be traded into and Fan of Knives will clear the 1/1 spiders. Savannah Highmane will just be Sap away allowing them complete board control. You will lose this match-up in most situations and on the off-chance they don't have any of their plethora of removal options you can steal a win.

Aggro Shaman is 30/70. Aggro Shaman just puts out way to much for us to deal with. There is absolutely no way to curve out better than they do. We have no form of efficient board clear to wipe their board. They have the better curve and board clear if they choose to run Lightning Storm. There just isn't anyway to beat them unless they get unlucky with their curve. The main tip I can give in this match-up is to clear every minion they put onto the board even the totems. They can spiral very quickly if a Flametongue Totem is dropped. If you can make it to turn 8 you have a chance of winning, but without healing that is rare.

Midrange Shaman is 50/50. You both have very similar curves and generally the match will be decided in the first 4 turns. Always go for the juggle with Fiery Bat on their Tunnel Trogg. That one play can mean the difference between winning or losing the game. Just focus on curving out better than they do and you have a chance.

Zoolock is an unfavorable 40/60 match-up. Make sure to keep Unleash the Hounds in the mulligan. Their flood the board tactics make it really hard to combat them. Unleash the Hounds can be potent at re-taking the board since a lot of their minions have only one health. If they do drop Darkshire Councilman, Kill Command can take him out. Just try to have an early game curve with Unleash the Hounds in hand to win this match-up.

Renolock is a favorable 60/40 match-up. Focus on curving out to win this one. Normally they will need literally every board clear that they have in-order to win. This is unlikely for them to have every single one. Reno Jackson is generally dropped after you use your first Call of the Wild. This will leave you with minions on board to pressure with and them without any means to deal with your board after using Reno Jackson. Follow-up with a second Call of the Wild and a good sized board and you win the game by a OTK.

C'Thun and Control Warrior are favorable 60/40 match-ups. Savannah Highmane is a huge threat to them. It is one of the hardest things for them to remove. Try not to lower their health below 12 unless you have too. You want to wait until you're ready to lethal them. There has been more than one occasion where a good Revenge and armor turn has lost me the game. In the end just double Call of the Wild for the win.

Patron Warrior is a unfavorable 40/60 match-up. Their Grim Patron turn can happen before your Call of the Wild. This gives them board presence that you can not combat. They also have a ton of board clear effects that benefit them and hinder you. Just try to curve out and hope that their Grim Patron will be arriving late. Also, trade into Armorsmith and Frothing Berserker if they appear, they are critical to remove.

Tempo Warrior is a even match-up. You just need to curve out better than they do to win. Often times their lethal turn is around turn 10. While yours is around turn 8-10. This allows you more opportunity to close the game before their lethal turn. If they can make it to their lethal turn, the game is often theirs though.

Aggro & Pirate Warrior 30/70 is a very unfavorable match-up. They just are so hard to beat. They don't really curve out better than you in any form or way. The issue is that they have weapons while we do not. They will be able to build their board while trading their face into your minions. Without anyway to clear their board you will inevitable succumb to the pressure and lose. It is a good thing this deck is inconsistent and isn't widely played for us.