Hearthpwn

Happy New Year! Hope you enjoy this brawl.

Tip 1: Save 0 mana and 1 mana minion in your hand unless you need to response to a big board from your opponent. Multiple low-cost minions may save you with random spell in the late game, in comparison to, only 1 playable minion in the urge of need. 

Tip 2: Don't do unnecessary summons. When you have 3 to 4 strong minions on the board while the enemy has no minion. you don't need to summon more minions because the additional summon may cause harm to your board. (See below for statics) Just use hero power and go face. Save the cards in the case of need.

Tip 3: Don't give up even you are in disadvantage in the early game, unless you discard your entire hand by Astral Communion or Cataclysm. Random spell may save you in the later game, Believe in the power of Yogg! 

Tip 4: (Point out by GetchX) Should attack first when you have advantage with your board. After you trade, all the buff card can possibly cast onto all your minions, instead onto enemy's. When you are in disadvantage, play your cards first, allowing buff casting on your minions.

If you have any good suggestion, or tips, comment below. We strike to make a better game experience.

The following is the statics of category about different functions of cards

Total Spells: 391 cards (KnC Version, including wild cards)
Harmful : 6 cards (1.56%)
Middle Ground: 153 cards (38.83%)
Conditional to No Effect: 43 cards (11.00%)
Mostly Beneficial: 189 cards (48.33%)

Note: The Shaman overload makes the ranking a little bit strange, I would consider it as little drawback.

Harmful
(Druid: 1 card) Astral Communion
(Shaman: 1 card) Ancestor's Call
(Warlock: 3 cards) Dark Pact, Treachery, Cataclysm
(Warrior: 1 card) Bring It On!

Middle Ground (depending on casting target and situation)
Single Target Removal (Damage)
(Druid: 7 cards) Moonfire, Lesser Jasper Spellstone,  Living Roots,  Naturalize,  Wrath, Mulch, Starfire
(Hunter: 7 cards) Arcane Shot, On the Hunt, Quick Shot, Toxic Arrow, Kill Command, Flanking Strike, Cobra Shot 
(Mage: 10 cards) Forbidden Flame, Arcane Blast, Flame Geyser, Frostbolt, Forgotten Torch, Fireball, Dragon's Breath, Flame Lance, Firelands Portal, Pyroblast
(Paladin: 2 cards) Hammer of Wrath, Holy Wrath, 
(Priest: 4 cards) Holy Smite, Shadow Word: Pain, Shadow Word: Death, Holy Fire
(Rogue: 5 cards) Shadowstep, Eviscerate, Jade Shuriken, Shiv, Shadow Strike
(Shaman: 9 cards) Earth Shock, Lightning Bolt, Crackle, Crushing Hand, Lava Shock, Stormcrack, Lava Burst, Jade Lightning,Tidal Surge
(Warlock: 15 cards) Mortal Coil, Soulfire,Darkbomb, Demonfire,Drain Soul, Drain Life,Shadow Bolt, Unwilling Sacrifice, Blastcrystal Potion, Imp-losion, Lesser Amethyst Spellstone, Bane of Doom, Demonheart, Feeding Time, Siphon Soul
(Warrior: 4 cards) Mortal Strike, Crush, Slam, Bash
Buff (Debuff) Card
(Druid: 4 cards) Barkskin,  Mark of the Wild,  Mark of Y'Shaarj, Mark of Nature
(Hunter: 2 cards) Hunter's Mark, Explorer's Hat
(Mage: 4 cards) Freezing Potion, Ice Lance, Polymorph: Boar, Polymorph
(Paladin: 16 cards) Adaptation,  Blessing of Might,  Blessing of Wisdom,  Divine Strength,  Hand of Protection,  Humility,  Dark Conviction, Desperate Stand, Equality, Potion of Heroism, Seal of Champions, Blessing of Kings, Silvermoon Portal, Blessed Champion, Spikeridged Steed, Dinosize
(Priest: 10 cards) Silence, Inner Fire, Power Word: Glory, Power Word: Shield, Confuse,  Divine Spirit, Purify, Unidentified Elixir, Velen's Chosen, Power Word: Tentacles
(Rogue: 2 cards) Backstab, Cold Blood
(Shaman: 7 cards) Ancestral Healing, Frost Shock, Ancestral Spirit, Cryostasis, Windfury, Avalanche, Hex
(Warlock: 2 cards) Power Overwhelming, Bloodfury Potion, 
(Warrior : 2 card) Inner Rage, Rampage
AOE
(Druid: 2 cards) Poison Seeds,  Starfall
(Hunter: 3 cards) Grievous Bite, Powershot, Explosive Shot
(Mage: 3 cards) Volcanic Potion, Cone of Cold, Meteor 
(Paladin: 1 card) Enter the Coliseum
(Priest: 6 cards) Spirit Lash, Shadow Word: Horror, Excavated Evil, Dragonfire Potion, Lightbomb, Psychic Scream, 
(Rogue: 1 card) Vanish
(Shaman: 2 cards) Elemental Destruction, Volcano
(Warlock: 8 cards) Corrupting Mist, Defile, Demonwrath, Spreading Madness, Hellfire, Felfire Potion, Twisting Nether, DOOM!
(Warrior: 5 cards) Whirlwind, Bouncing Blade, Brawl, Revenge, Sleep with the Fishes
Healing 
(Druid: 2 cards) Healing Touch,  Tree of Life
(Paladin: 3 cards) Forbidden Healing,  Holy Light, Lay on Hands
(Priest: 4 cards) Circle of Healing, Binding Heal, Flash Heal, Light of the Naaru
(Shaman: 1 card) Healing Wave

Conditional to No effect
(Druid: 1 card) Savagery 
(Hunter: 7 cards) Bestial Wrath, Play Dead, Smuggler's Crate, Stampede, Feign Death, Lock and Load, Dinomancy
(Mage: 8 cards) Shifting Scroll, Shatter, Counterspell, Mana Bind, Spellbender, Deck of Wonders, Dragon's Fury, Glacial Mysteries
(Paladin: 3 cards) Small-Time Recruits, Level Up!, Anyfin Can Happen
(Priest: 5 cards) Potion of Madness, Psionic Probe, Embrace the Shadow, Shadow Visions, Twilight's Call
(Rogue: 7 cards) Preparation, Deadly Poison, Doomerang, Leeching Poison, Envenom Weapon, Blade Flurry, Tinker's Sharpsword Oil
(Shaman: 4 cards) Totemic Might, Primal Fusion, Ice Fishing, Reincarnate
(Warlock: 3 cards) Sacrificial Pact, Bloodbloom, Demonfuse
(Warrior: 5 cards) Shield Slam, Bolster, Forge of Souls, Reckless Flurry,  Explore Un'Goro

Mostly Beneficial
Single Target Removal (Damage)
(Druid: 6 cards)  Recycle, Claw, Feral Rage,  Gnash,  Bite, Savage Roar
(Hunter: 4 cards) Deadly Shot, Dart Trap, Snipe, Misdirection
(Mage: 4 cards) Breath of Sindragosa, Explosive Runes, Flamecannon,  Vaporize
(Paladin: 3 cards) Sacred Trial,  Eye for an Eye, Seal of Light, 
(Priest: 5 cards) Mind Blast, Entomb, Mind Control, Shadow Madness,  Embrace Darkness
(Rogue: 5 cards) Sinister Strike,  Headcrack, Sap, Sabotage, Assassinate, Lesser Onyx Spellstone
(Shaman: 0 card) 
(Warlock: 3 cards) Corruption, Fist of Jaraxxus,  Curse of Rafaam
(Warrior: 3 cards)  Upgrade!, Execute, Heroic Strike,
Buff (Debuff) Card
(Druid: 4 cards) Mark of the Lotus, Power of the Wild, Soul of the Forest,  Evolving Spores
(Hunter: 2 cards)  Infest, Hidden Cache
(Mage: 2 cards) Frost Nova, Potion of Polymorph
(Paladin: 5 cards) Avenge,  Competitive Spirit,  Repentance,   Smuggler's Run, Redemption
(Priest: 2 cards) Pint-Size Potion, Mass Dispel
(Rogue: 1 card) Conceal
(Shaman: 7 cards) Unstable Evolution, Evolve,  Devolve, Primal Talismans, Spirit Echo, Bloodlust, Everyfin is Awesome
(Warlock: 0 card) 
(Warrior: 3 cards) Commanding Shout, Charge, Stolen Goods
AOE
(Druid: 1 cards) Swipe
(Hunter: 3 cards) Multi-Shot,  Crushing Walls, Explosive Trap
(Mage: 5 cards)  Arcane Missiles,  Arcane Explosion,    Blizzard, Flamestrike, Greater Arcane Missiles 
(Paladin: 2 card) Avenging Wrath, Consecration
(Priest: 1 cards) Holy Nova
(Rogue: 3 card) Sudden Betrayal, Betrayal, Fan of Knives
(Shaman: 3 cards) Forked Lightning, Maelstrom Portal, Lightning Storm
(Warlock: 2 cards)  Shadowflame,  Dark Bargain
(Warrior: 1 cards) Cleave
Healing
(Druid: 2 cards) Earthen Scales, Moonglade Portal
(Hunter: 0 card)
(Mage: 2 cards) Ice Barrier, Ice Block
(Paladin: 0 card)
(Priest: 1 card) Greater Healing Potion
(Rogue: 1 card) Evasion
(Shaman: 1 card) Healing Rain
(Warlock: 0 card) 
(Warrior: 3 cards) Iron Hide, Unidentified Shield, Shield Block
Card Draws
(Druid: 2 cards) Raven Idol, Lunar Visions 
(Hunter: 3 cards) Tracking, Call Pet, Flare
(Mage: 9 cards) Lesser Ruby Spellstone, Primordial Glyph, Unstable Portal, Arcane Intellect, Duplicate,  Frozen Clone, Simulacrum, Cabalist's Tome, Echo of Medivh
(Paladin: 4 cards) Getaway Kodo, A Light in the Darkness,  Solemn Vigil, Divine Favor
(Priest: 4 cards)  Mind Vision, [ Convert, Thoughtsteal, Devour Mind
(Rogue: 9 cards) Hallucination, Journey Below, Razorpetal Volley, Roll the Bones, Cheat Death, Burgle, Mimic Pod,  Thistle Tea, Sprint
(Shaman: 3 cards) Finders Keepers,  Ancestral Knowledge,  Far Sight
(Warlock: 1 card)  Sense Demons
(Warrior: 3 cards) I Know a Guy,  Battle Rage, Blood Warriors
Summon
(Druid: 8 cards) Force of Nature,  Oaken Summons,  Living Mana, Webweave,  Dark Wispers, Spreading Plague,  Wisps of the Old Gods,  Ultimate Infestation
(Hunter: 11 cards)  Bear Trap, Snake Trap, Cat Trick, Venomstrike Trap, Wandering Monster, Animal Companion, Unleash the Hounds, Lesser Emerald Spellstone, Ball of Spiders, To My Side!, Call of the Wild 
(Mage: 4 cards) Mirror Image, Mirror Entity, Effigy, Molten Reflection
(Paladin: 6 cards) Lost in the Jungle,  Noble Sacrifice, Lesser Pearl Spellstone, Muster for Battle, Call to Arms,  Stand Against Darkness
(Priest: 7 cards) Forbidden Shaping,  
Resurrect,  Eternal Servitude,  Mindgames, Shadow Essence, Lesser Diamond Spellstone, Free From Amber
(Rogue: 1 card) Beneath the Grounds
(Shaman: 3 cards) Feral Spirit, Call in the Finishers,  Lesser Sapphire Spellstone
(Warlock: 2 cards) Forbidden Ritual, Kara Kazham!
(Warrior: 6 cards) Blood To Ichor, Protect the King!,  Ironforge Portal, Sudden Genesis, Gather Your Party,  Lesser Mithril Spellstone
Others
(Druid: 7 cards) Innervate,  Jade Idol,  Wild Growth,  Jade Blossom,  Pilfered Power, Branching Paths, Nourish
(Hunter: 1 cards) Freezing Trap
(Mage: 0 card) 
(Paladin: 0 card) 
(Priest: 1 card) Shadowform
(Rogue: 2 card)  Counterfeit Coin, Gang Up, 
(Shaman: 0 card)   
(Warlock: 1 card) Renounce Darkness
(Warrior: 1 card) Dead Man's Hand