Hearthpwn

Keep Always:

These guys are core cards and best 4 and 5 mana drops in this deck, Kazakus is so flexible card and mostly it saves your game and pushes back your opponent in early game. Raza is the second most needed card in this game, even if you face aggro decks hold it, and if you have a coin, just play it on turn 4 and heal yourself for 0 mana, 5/5 is a big threat in early game for any kind of class.

 -Against Aggro and Midrange Decks-

(Face Hunter, Murloc Pal, Face Shaman, Aggro Druid, Tempo Rogue)

-Against Control Decks-

(Krullock, N'zoth Priest, Control Mage, Control Warrior)

Two main priorities:

-Survive (The deck contains a lot of aoe spells, try to clean your opponent's board);

-Draw a card (be careful while playing Acolyte of Pain, your opponent can burn your cards).

1)It's a combo deck, BUT keep in mind that if you play against Aggro decks, forget about your combo, otherwise your opponent finishes the game on turn 5-6.

2)Draw your cards and try to find your CORE cards such as Shadowreaper Anduin and Raza the Chained. In mirror matches, you can play Excavated Evil just like that to counter Raza, Reno, Kazakus (you opponent probably has Excavated Evil in his deck)

-Why not Lyra the Sunshard?

It's because Lyra the Sunshard isn't winning condition, and it is not the part of your combo. But I have another version of this deck with Lyra the Sunshard with more low mana spells so you can burn your opponent's face if you played DK and I can post it too if you ask.

-Why not Elise the Trailblazer?

Elise the Trailblazer suits well in control decks, and I tried Elise in early version of this deck, but she was unnecessary, your task is to burn your opponent's face with finishers like Spawn of Shadows  and Prophet Velen, thanks to them, you can deal more than 30 damage in a single turn.

If you have ever played Highlander Priest in Stardand, you don't need to read this.

If you have Played DK and Raza Earlier the following combo deals 28 damage in a single turn:

BUT thanks to the following cards you can deal a way more damage, you can OTK even if your opponent got 5 armor from DK:

And yes, sometimes it's better to choose 1 mana Kazakus Potion instead of 10, to OTK your opponent, Under the Velen it deals *6* damage to face and it's a great advantage while you combine it with *4* damage heropower.

Bad Matchups:

Exodia Mage-

Fortunately, Exodia Quest mage is not so popular in wild so don't worry too much about it. Your deck is slow, even if you draw your Core cards, your opponent has 2x Ice Blocks and too much freezing stuff. But you can win, Dirty Rat can pull off Archmage Antonidas, besides  Curious Glimmerroot can give you Ice Block .

Big Priest-

the only way to win Big Priest is playing cards by mana curve every turn by tempo to keep your opponent on pressure. Try to find Polymorph from Kazakus Spell and keep silence for Obsidian Statue. Hold Potion of Madness for Barnes, it's a good counter.

Good Matchups:

Krullock-

This deck is really good vs any warlock class deck. Krullock is slow and your opponent uses heropower to draw a card and loses health, and you can take an advantage from this and OTK your opponent without Emperor Thaurissan  or Prophet Velen.

N'zoth Priest-

N'zoth Priest is slow, mostly tries to defend himself playing taunt and deathrattle minions, slowly lower your opponent's face by DK every turn, your opponent doesn't play Reno when he has 20 or more health, and 20 damage in a single turn is not a problem for Highlander Priest.

Jade Druid - 

Jade druid in wild is not as powerful as in stardard against Highlander Priest. The deck contains a lot of AoE spells like Lightbomb,Kazakus Potion, DK Anduin, Dragon Potion, Excavated Evil to survive Jade Giants. Just keep drawing cards, if you find DK and Raza you win the game easily.