Hearthpwn

 - Scholomance Academy
Argent Braggart - Strong tempo play in pure paladin.
Cabal Acolyte - Great synergy with Wave of Apathy
Devout Pupil - Staple in pure paladin.
Guardian Animals - Buildaround card in ramp druid.
Survival of the Fittest - Staple in ramp druid.
Secret Passage - Sees play in all relevant rogue decks.

- Ashes of Outland
Bamboozle - Staple in Galakrond secret rogue.
Glowfly Swarm - Buildaround card in spell druid.
Greyheart Sage * - Sees play in highlander and galakrond rogue.
Mo'arg Artificer - Sees play in a variety of control decks, especially control warlock.
Nagrand Slam - Great winrate, mainly used in highlander hunter.
Warglaives of Azzinoth - Staple in aggro demon hunter.

DHI - Demon Hunter Initiate
Eye Beam - Staple in aggro demon hunter.

GAW - Galakrond's Awakening
Boompistol Bully - Excellent counter to Galakrond decks such as warrior or rogue.
Escaped Manasaber - Sees play in a variety of highlander decks.

- Descent of Dragons
Dark Skies - Strong board clear for quest warlock.
Rolling Fireball * - Strictly better Flame Lance, solid removal option for mage.
Stormhammer - Staple in dragon hunter.

- Saviors of Uldum
Bloodsworn Mercenary - Enrage warrior is still strong even after the nerfs.
Livewire Lance - Staple in enrage warrior, playable in any tempo-based warrior deck.
Puzzle Box of Yogg-Saron # - Staple in highlander mage.
Tortollan Pilgrim # - Staple in highlander and big spell mage.
Vulpera Scoundrel # - Used by a variety of classes and decks.

 – Rise of Shadows
Power of Creation # - Staple in highlander mage, great synergy with Tortollan Pilgrim.

 - Classic
Doomsayer# - Historically good card, playable in many slower decks.
Murloc Warleader - Staple in murloc paladin, good winrate.
Snake Trap # - Staple in highlander and secret hunter, good winrate.
Twisting Nether # – Staple in quest warlock.

 - Scholomance Academy
Devolving Missiles - High playrate, but hurt by nerfs to druid.
Flesh Giant - Staple in zoo warlock.
Potion of Illusion - Buildaround card in tortollan mage.
Steeldancer - Staple in weapon rogue.

- Ashes of Outland
Bladestorm * - Playable in control warrior.
Libram of Hope * - Staple in pure paladin.
Sethekk Veilweaver - Playable in highlander priest.
Underlight Angling Rod * - Good value card, staple in murloc paladin.
Warmaul Challenger * - Sees play in a variety of warrior decks.

- Descent of Dragons
Fate Weaver * - Staple in Galakrond priest.
Lightforged Crusader * - Buildaround card for pure paladin, solid winrate.
Toxic Reinforcements *- Sees success in aggressive face decks.
Umbral Skulker - Sees play in Galakrond rogue.
Veiled Worshipper * - Huge payoff for Galakrond warlock, decent winrate.

 - Saviors of Uldum
Anubisath Defender * - Playable in a variety of druid decks.
Plague of Death * - Staple in all priest decks.

 – Rise of Shadows
Wrenchcalibur * - Playable in control warrior.

 - Classic
Brawl * - Staple in slower warrior decks, good winrate.
Force of Nature - * Staple in treant druid.
Preparation - Playable in malygos and highlander rogue.
Pyroblast * # - Staple in big spell mage.
Sea Giant - Historically strong card which is seeing less play at the moment.
Shield Slam - Staple in control warrior, good winrate.
Southsea Captain - Playable in pirate warrior, hurt by nerfs but still has a good winrate.

 - Scholomance Academy
Combustion - Playable in highlander mage.
Transfer Student - Sees play in several highlander decks.
Trueaim Crescent - Playable in highlander hunter.

- Ashes of Outland
Apexis Blast - Buildaround card in spell mage.
Augmented Porcupine - Playable in face hunter.
Boggspine Knuckles - Staple in galakrond shaman.
Skeletal Dragon - Playable in most priest decks.

DHI - Demon Hunter Initiate
Wrathscale Naga - Buildaround in token demon hunter, mediocre winrate.
Wrathspike Brute - Sometimes used in highlander demon hunter.

- Descent of Dragons
Dragon's Pack - Hurt hard by recent nerfs.
Kobold Stickyfinger - Tech card which performs decently against warrior and demon hunter.
Sanctuary - Niche card for pure paladin: good against control but weak against aggro.
Skyfin - Sees some play in hunter and paladin, but overall dragon/murloc hybrids haven't taken off.

 - Saviors of Uldum
Crystal Merchant * - Played in embiggen druid, also still works in quest druid.
History Buff - Interesting effect, playable in highlander rogue and zoo decks.
Psychopomp * - Staple in resurrect priest which has a lower winrate currently.
Splitting Axe * - Playable in totem shaman.
Tip the Scales - Sees play in murloc paladin, good winrate but low playrate.
Wild Bloodstinger # - Playable in highlander hunter, also a tech option vs combo decks.

 – Rise of Shadows
Crystalsong Portal - Usable in treant druid but can be replaced.
Mana Cyclone - The DoD elemental package boosted cyclone mage's winrate, but not by much.
Magic Carpet * - Has not adjusted well to the zoolock nerf.
Omega Devastator * - Formerly strong card which currently sees little play.
Waggle Pick * - Often played in aggressive rogue decks.
Witch's Brew - Sees play in galakrond shaman, hurt by recent nerfs.
Unidentified Contract * - Value card which sees some play in galakrond rogue.

 - Classic
Avenging Wrath - Occasionally used in pure paladin.
Cabal Shadow Priest * - Used in a variety of priest decks despite the low playrate.
Far Sight - Playable in Galakrond shaman decks which struggle in the current meta.
Hungry Crab * # - Decent tech card against murloc decks.
Icicle * - Performs decently in highlander mage, low playrate.

 - Scholomance Academy
Ceremonial Maul - Playable in big warrior which is a dying archetype.
Felosophy - Low winrate but good synergy with Desk Imp.
Runic Carvings - Playable in totem shaman.
Totem Goliath - Playable in totem shaman.
Void Drinker - Control warlock has been hurt by the druid nerfs.

- Ashes of Outland
Apexis Smuggler - Decent card, but secret mage lacks enough synergy to be competitive.
Darkglare - Sometimes used in zoolock, but performs poorly in that deck.
Marsh Hydra * - Used in big druid, a slow and ineffective archetype.
Shattered Rumbler - Spell shaman has a low winrate.
Waste Warden - Niche tech card, performs poorly in the current meta.

DHI - Demon Hunter Initiate
Flamereaper - Commonly used in highlander demon hunter.

GAW - Galakrond's Awakening
Chaos Gazer - Very weak effect which is often useless when played on curve.

  - Descent of Dragons
Chromatic Egg - Very slow, but can work in quest paladin.
Cumulo-Maximus * - Struggles to find a home after the rotation.
Embiggen * - Embiggen druid has fallen off hard in AoO.
Mana Giant - Sees play in cyclone mage which is not a strong archetype. T2 in Wild.
Necrium Apothecary - Has not recovered from the nerf.
Ramming Speed * # - Mediocre removal option for warrior.

 - Saviors of Uldum
Blatant Decoy - Staple in big paladin and shaman, low winrate currently.
Diseased Vulture - * No longer sees any play in zoolock.
Micro Mummy * - Played in a variety of weak decks.
Plague of Murlocs * # -  Shaman is not in a great spot competitively.
Riftcleaver - Effect is not worth the downside.
Scarlet Webweaver # - Niche card which does not currently see much play.
Shadow of Death - Poor winrate but does have some synergy with Stowaway.

 – Rise of Shadows
Batterhead - Played in slower priest and druid decks, low winrate.
Dragon Speaker - Dragon paladin is playable but unimpressive.
Hench-Clan Hag - Niche card for token decks.
Lazul's Scheme - Playable in miracle priest, very low winrate.
Muckmorpher - Staple in big shaman which is a niche deck in the current meta.
Nine Lives * - Sees little play currently.
Shadowy Figure - Low winrate, but good synergy with Grave Rune.
Unseen Saboteur - Niche tech card against spell heavy decks.

 - Classic
Ancient of Lore - Playable in heal and quest druid, low winrate.
Ancient of War - Does not make the cut in most quest druid decks, bad winrate.
Big Game Hunter * # - Tech option against large minions, low playrate.
Doomhammer * - Has not found a new deck after the rotation.
Faceless Manipulator - Playable in slower mech paladin decks, low winrate.
Gladiator's Longbow - Sees very little play but playable in slower hunter decks.
Gorehowl - Niche card for minion-heavy warrior decks.
Lay on Hands - Staple in spell paladin, low winrate.
Spellbender - Playable in secret mage, low winrate.

 - Scholomance Academy
Ancient Void Hound - Extremely slow card.
Educated Elekk - Very weak effect which can hurt more than it helps.
Enchanted Cauldron - Meme card, sees very little play.
Krolusk Barkstripper - Effect hard to trigger.
Playmaker - Niche effect, low winrate.

- Ashes of Outland
Pit Commander - Big demon hunter has a very low winrate.
Replicat-o-tron - Very niche effect which is difficult to make use of.
Shadow Council - Meme card.

GAW - Galakrond's Awakening
Shadow Sculptor - Often a worse Gadgetzan Auctioneer, low winrate.

 - Descent of Dragons
Blowtorch Saboteur - Lacks any form of synergy to justify using in your deck.
Dread Raven - Dread Raven OTK decks are not viable.
Envoy of Lazul - Priest's thief synergies have historically performed poorly, and this is no exception.
Grizzled Wizard - Meme card.
Tentacled Menace - Extremely unreliable, frequently helps your opponent.
Transmogrifier - A liability.
Scion of Ruin * - Galakrond warrior lost the cards that made it viable with the rotation.
Secure the Deck - Lacks any synergy in standard, awful winrate.
Wyrmrest Purifier * - Has a low playrate after the standard rotation.

 - Saviors of Uldum
Body Wrapper - Very unreliable card, you usually will not get what you want.
Desert Obelisk - This is a card for casual mode, not recommended on ladder.
Dwarven Archaeologist - Meme card, effect difficult to make good use of.
Mischief Maker - Possible tech card vs decks going on fatigue but very low winrate.
Mogu Cultist - Mogu decks have terrible winrates.
Mortuary Machine - Meme card, often a worse Fel Reaver.
Whirlkick Master - Slow card, effect difficult to make use of.

 – Rise of Shadows
Arcane Fletcher - Has meme potential in midrange hunter.
Azerite Elemental - Meme card.
Big Bad Archmage - Very slow card.
Crystal Stag - Oasis Surger performs similarly without a condition.
Darkest Hour - Meme card.
Duel! - Big paladin decks are not viable.
Jumbo Imp - Difficult to discount efficiently.
Portal Overfiend - Weak card for Plot Twist Warlock.
Whirlwind Tempest - Meme card, playable in experimental big shaman decks.

 - Classic
Bane of Doom - Very unreliable card, low winrate.
Barrens Stablehand - Meme card.
Bestial Wrath - Meme card.
Blood Knight - Niche tech card, useless in the current meta.
Earth Elemental - Playable in heavy-overload decks, very low winrate.
Kidnapper - Overpriced card, outclassed by better removal options.
Mindgames - Meme card, playable in fun steal decks.
Patient Assassin - Outclassed by better removal options for rogue.
Pit Lord - Playable in demonlock, very low play and winrate.
Shadowform – Often a liability, meme card.
Sword of Justice * - Sees very little play after the rotation.

 Standard ranking change log for Year of the Dragon:

For details on how Standard will rotate, check out this thread!

Standard (Wild Ranking)
Mana Cyclone – Staple in quest mage.
Mana Giant – Staple in quest mage.

 – The Witchwood
Book of Specters * - Staple in quest mage.

 – Kobolds & Catacombs
Branching Paths  - Very flexible card, staple in most druid decks.
Psychic Scream - Very strong card, sees play in Reno Priest
Voidlord - Staple in most warlock decks, including reno and cubelock.

 – Knights of the Frozen Throne
Nerubian Unraveler – Staple in Darkest Hour Warlock, decent winrate.
Ultimate Infestation - Staple in jade druid, also sees play in ramp druid.

 – Journey to Un’Goro
Bloodbloom * - Staple in Mecha'thun and Darkest Hour Warlock.
Primordial Glyph - Staple in quest mage; playable in a variety of decks.
Shadow Visions  - Staple in several priest decks, especially control.

 – Mean Streets of the Gadgetzan
Dirty Rat # - Strong tech card against combo and OTK decks.
Dragonfire Potion #* - Powerful board clear for reno priest.

 – One Night in Karazhan
Arcane Giant – Strong finisher in quest mage, but will soon be nerfed.

 – Goblins & Gnomes
Lightbomb # - Staple in many priest decks, good winrate.

 – Hall of Fame
Ice Block #* - Staple in control and secret mage, very good winrate.

Standard (Wild Ranking)
Darkest Hour * – Strong buildaround card for warlock.

 – Rastakhan’s Rumble
Masked Contender # – Staple in secret rogue, playable in any secret deck.

 – The Boomsday Project
Juicy Psychmelon – Does not have any home in the current meta, but has niche potential in the future.
Supercollider # – Playable in any slower warrior archetype.

 – The Witchwood
Baleful Banker * - Staple in Holy Wrath Paladin.
Rat Trap # - Staple in secret and highlander hunter, great winrate.
Sandbinder # - Often played in highlander decks as a reliable tutor of Zephrys the Great.
Town Crier - Staple in any warrior deck with very solid winrate.
Wispering Woods * – Playable in token druid, good winrate.

 – Kobolds & Catacombs
Arcane Tyrant - Often played in big spell and reno mage, good winrate currently.
Call to Arms - Staple in murloc and giant paladin; strong card in any aggro deck.
Corridor Creeper - Nerfed hard but still sees play in odd paladin and evolve shaman.

 – Knights of the Frozen Throne
Gnomeferatu # - Tech card vs combo decks, currently sees play in renolock.
Obsidian Statue  – Staple in slow priest decks.
Skulking Geist #* - Tech vs jade druid which is popular in the current meta.
Treachery * – Staple in treachery warlock, playable in Mecha'thun warlock.

 – Journey to Un’Goro
Charged Devilsaur - Often played in Darkest Hour Warlock, good winrate.
Gentle Megasaur – Finisher in murloc decks, very good winrate in shaman and paladin.
Gluttonous Ooze # - Strong tech card, sees regular play in control and highlander decks.
Vilespine Slayer - Staple in odd rogue, playable in any rogue deck.

 – Whispers of the Old Gods
Call of the Wild * - Recently buffed, good winrate.
Vilefin Inquisitor – Strong card in murloc paladin but low playrate.

 – The Grand Tournament
Garrison Commander - Playable in even shaman and even hunter, good winrate.
Twilight Guardian - Sees some play in dragon priest, decent winrate.

 – Goblins & Gnomes
Feign Death #- Playable in deathrattle hunter.
Quartermaster * - Staple in odd paladin.

 – Rastakhan’s Rumble
Auchenai Phantasm # - Playable in reno priest.
Crowd Roaster - Playable in all dragon decks.
Master's Call - Formerly strong, but midrange hunter is a dying archetype.
Soulwarden * - Playable in discolock, decent winrate.
Splitting Image * - Playable in secret mage.
Stampeding Roar - Excellent synergy with Winged Guardian and Oondasta.

 – The Boomsday Project
Dreampetal Florist * - Playable in combo druid decks.
Glowstone Technician - Strong card even though paladin is not currently in its best spot.
Necromechanic # - Playable in highlander and mech hunter, decent winrate.
Omega Agent - Playable in handlock which recently received a lot of support.
Prismatic Lens – Holy Wrath paladin is significantly weaker post-nerfs.
Thunderhead – Playable in even shaman.

 – The Witchwood
Arcane Keysmith # - Often played in highlander mage.
Mossy Horror # - Tech card vs swarm decks, playable in highlander decks.
Nightmare Amalgam * - Versatile card for tribal decks, low playrate.
Vivid Nightmare - Sees play in quest priest, mediocre winrate.
Voodoo Doll # - Often played in highlander mage and questlock, lower winrate after nerfs.

 – Kobolds & Catacombs
Carnivorous Cube # - Staple in cubelock and deathrattle hunter.
Cataclysm # - Staple in Mecha'thun Warlock.
Dragon's Fury – Playable in reno and control mage, reasonable winrate.
Reckless Flurry * - Playable in odd warrior, worse winrate in SoU.
Spiteful Summoner - Build-around card, playable in druid and priest decks.
To My Side! - Staple in spell hunter which sees little play in the current meta.
Unstable Evolution # - Playable in evolve shaman.
Void Ripper # - Playable in odd paladin and rogue but low playrate.

 – Knights of the Frozen Throne
Corpsetaker - Often played in even shaman, playable in other even decks.
Simulacrum # – Decent winrate and staple in exodia mage running Emperor Thaurissan.

 – Journey to Un’Goro
Bittertide Hydra – Sees little play but playable in aggressive decks.
Meteor # – Playable in reno and big-spell mage.

 – Mean Streets of the Gadgetzan
Kabal Trafficker # - Playable in renolock, good winrate but low playrate.
Rat Pack – Playable in beast hunter, used to be staple in many hunter decks.
Sleep with the Fishes #* - Playable in control and fatigue warrior.
Small-Time Recruits - Playable in murloc paladin, rise in winrate.

 – Whispers of the Old Gods
Cabalist's Tome # - Slow card but playable in exodia mage, has also seen play in control mage.
DOOM! # – Playable in reno and Mecha'thun Warlock.
Faceless Shambler - Sees play in evenlock, lower playrate recently.

 – The Grand Tournament
Mulch – Mediocre winrate but a hard removal option for druid.
Mysterious Challenger - Staple in secret paladin, good winrate but low playrate.

 – Goblins & Gnomes
Enhance-o Mechano - Playable in mech and swarm decks, big rise in winrate.
Fel Reaver # - Sees play in mech hunter with good winrate, playable in any aggressive deck.
Hobgoblin - Sees play in zoolock, big rise in winrate.

 – Curse of Naxxramas
Echoing Ooze - Surprise tech in swarm decks, low play and winrate.

 – Hall of Fame
Molten Giant – Often played in evenlock and heal paladin, strong synergy with High Priest Thekal.
Mountain Giant * - Frequently played in evenlock, mediocre winrate.

 – Rastakhan’s Rumble
A New Challenger... - Occasionally used in slower paladin decks, mediocre winrate.
Big Bad Voodoo - Low playrate, hurt by recent shaman nerfs.
Blast Wave – Playable in highlander mage, mediocre winrate.
Haunting Visions – Playable in both aggro and galakrond shaman, hurt by recent nerfs.
Mosh'Ogg Announcer - Struggles to find a home in the current meta.
Smolderthorn Lancer - Playable in Galakrond warrior and highlander warrior.
Sul'thraze # - Playable in highlander warrior, also playable in quest decks.
Treespeaker - Playable in treant druid, good winrate.

 – The Boomsday Project
Academic Espionage - Niche card for thief rogue, low winrate.
Astromancer # - Playable in highlander and freeze mage.
Augmented Elekk * - Used in a variety of weak decks, poor winrate.
Crystallizer - Sometimes played in zoo decks, low playrate.
Seaforium Bomber * - Niche card for bomb warrior and quest shaman.
Unexpected Results - Sees fringe play in cyclone mage.
Weaponized Pinata - Low winrate but a niche card for mech decks.

 – The Witchwood
Cathedral Gargoyle - Dragon paladin has a low winrate.
Hidden Wisdom - Does not have a home in the current meta.
Spectral Cutlass - Low winrate, anti-synergy with Bazaar Burglary.
Witch's Cauldron – Playable in zoo and swarm decks but low playrate.

 – Kobolds & Catacombs
Crushing Walls - Playable in spell hunter, low winrate.
Dragonhatcher - Has seen play in big and taunt druid.
Evasion – Playable in mill and Malygos rogue, low winrate.
Fal'dorei Strider - Fell flat after recent rogue nerfs, sees little play.
Grand Archivist - Playable in Spiteful Summoner decks, very low playrate.
Twilight Acolyte * - Staple in dragon priest which has low playrate currently.

 – Knights of the Frozen Throne
Blackguard - Sees little play, outclassed in heal paladin.
Bring It On! - Sees some play in fatigue warrior, low winrate.
Dead Man's Hand – Playable in fatigue and recruit warrior, low winrate.
Doomerang - Hurt by recent rogue nerfs, sees very little play.
Drakkari Enchanter - Sees some play in big druid, synergy with Emperor Thaurissan.
Fatespinner - Niche card for token druid, low winrate.
Meat Wagon - Sees some play in mech deathrattle paladin, okay winrate.
Rattling Rascal - A liability but has strong synergy with Evolve.
Snowfury Giant – Playable in heavy overload decks.

 – Journey to Un’Goro
Blazecaller – Playable in elemental decks which are fringe in the current meta.
Bright-Eyed Scout * - Sees very little play but has niche potential in big spell mage.
Chittering Tunneler - Sees very little play but decent winrate.
Curious Glimmerroot * – Niche card for reno priest, mediocre winrate.
Dinosize – Situational card which sees some play in even paladin.
Giant Anaconda – Playable in Mecha'thun Druid, low winrate.
Living Mana – Often played in token druid, good winrate but low playrate.
Primordial Drake *- Playable in dragon and control decks, very low playrate.
Stone Sentinel - Playable in elemental shaman, low winrate.

 – Mean Streets of the Gadgetzan
Fight Promoter - Playable in hand-buff decks, low winrate.
Mana Geode – Sees very little play but playable in proactive priest decks.
Manic Soulcaster - Playable in reno and control mage, low play and winrate.

 – Whispers of the Old Gods
Eternal Sentinel - Playable in overload aggro shaman, low winrate.
Forbidden Healing - Tech option for heal paladin.
Giant Sand Worm - Sees very little play but a niche card for recruit hunter.
Wisps of the Old Gods – Low playrate but playable in token druid.

 – The Grand Tournament
Arcane Blast - Low winrate, has seen play in burn mage.
Beneath the Grounds - Tech option for mill decks, low winrate.
Coldarra Drake - Sees little play but playable in inspire decks.
Elemental Destruction - Playable in control shaman, low winrate.

 – Goblins & Gnomes
Ancestor's Call – Staple in Malygos and big shaman, which are niche archetypes.
Clockwork Giant - Tech card vs control decks, very low playrate.
Coghammer - Niche card for mech paladin, good winrate but very low playrate.
Crush - Low win and playrate but playable in slower warrior decks.
Demonheart – Sees very little play but playable in demon decks.
Piloted Sky Golem - Playable in midrange decks, decent winrate but low playrate.
Siltfin Spiritwalker - Often played in murloc shaman, low playrate.

Wild ranking change log for Year of the Dragon:

References

The list has been assembled using data from:

• hsreplay.net,
• hearthstone.gamepedia.com,
• vicioussyndicate.com and
• icy-veins.com

Special Thanks To

• SnoderFaner
• SlydE,
• Chimera,
• LightBrain and

all users who have made suggestions to keep the guide updated!