Okay, after “re-living” the “nostalgia”, I propose these comprehensive Balance Changes to help players get along more:
Card Name / Change
Druid
- Jungle Giants / Quest: Summon 3 minions with 5 or more Attack. Reward: Barnabus.
- Barnabus The Stomper / Battlecry: Reduce the Cost of your 5 or more Attack minions everywhere by (2).
- Tyrantus / 14/14. Taunt. Can’t be transformed or transformed into.
- Elder Longneck / 5 Attack, 2 Health.
- Living Mana / Transform your Mana Crystals into 2/2 Treants. Recover the mana when they die or are Bounced.
- Mana Treant / Bounced or Deathrattle: Gain an empty Mana Crysal.
- Tyrantus / Taunt, Can’t be transformed or transformed into.
Hunter
- The Marsh Queen / Quest: Play five 1-Cost minions. Reward: Queen Carnassa.
- Queen Carnassa / Rush, Battlecry: Get 3 Raptors. Shuffle 4 Raptors into your deck.
- Starving Buzzard / Whenever you summon a Beast, gain 1 Mana Crystal this turn only.
Mage
- Open the Waygate / Quest: Cast 4 spells that didn’t start in your deck. Reward: Time Warp.
- Counterspell / Secret: When your opponent casts a Class spell, Counter it.
Paladin
- The Last Kaleidosaur / Quest: Cast 3 spells on your minions. Reward: Galvadon.
- Galvadon / Battlecry: Adapt 3 times.
- Repentance / Secret: After your opponent plays a minion with 2 or more Health, reduce its Health to 1.
Priest
- Awaken the Makers / Quest: Summon 3 Deathrattle minions. Reward: Amara, Warden of Hope.
- Amara, Warden of Hope / Battlecry: Give your hero +11 Health.
- Northshire Cleric / Whenever a minion is healed, gain 1 Mana Crystal this turn only.
Rogue
- The Caverns Below / Quest: Play a minion with the same name 2 times. Reward: Crystal Core.
- Crystal Core / For the rest of the game, your first played minion each turn has +1/+1.
Shaman
- Unite the Murlocs / Quest: Summon 4 Murlocs. Reward: Megafin.
- Megafin / Taunt, Battlecry: Get 4 random Murlocs.
- Air Elemental / 2 Attack, 2 Health.
- Dust Devil / Windfury. Overload: (1)
Warlock
- Lakkari Sacrifice / Quest: Discard 4 cards. Reward: Nether Portal.
- Nether Portal / For the rest of the game, summon a 3/2 Imp whenever your turn ends.
- DOOM! / Destroy all minions. Draw 2 cards.
- Cho’gall / Battlecry: Return 4 cards you discarded this game to your hand. They cost Health instead of Mana.
- Malchezaar’s Imp / Whenever you discard a card, gain 1 Mana Crystal this turn only.
- Kara Kazham! / [4 Mana]
- Tar Lurker / 1 Attack, 8 Health.
Warrior
- Fire Plume’s Heart / Quest: Play 4 Taunt minions. Reward: Sulfuras.
- Sulfuras / Battlecry: Your Hero Power becomes ‘Deal 4 damage to a random enemy.’
- Fire Crush You! / Deal 4 damage to a random enemy.
- Battle Rage / [3 Mana] Draw a card. Draw 1 more for each damaged friendly minion.
- Tentacles for Arms / [4 Mana]
- Fool’s Bane / [4 Mana]
- Protect the King! / For each enemy minion, summon a 1/3 Pawn with Taunt.
Neutral
- Bright-Eyed Scout / Battlecry: Draw a card. Reduce the Cost of all your non-ability minions everywhere by (1).
- Emerald Reaver / Battlecry: Deal 2 damage to each hero.
- Fire Fly / 1 Attack, 3 Health.
- Glacial Shard / 2 Attack, 2 Health.
- Frost Elemental / 6 Attack, 5 Health.
- Sabretooth Stalker / [5 Mana]
- Nesting Roc / 3 Attack, 7 Health. Taunt, Battlecry: If you control at least 2 other minions, gain +1/+1.
- Bittertide Hydra / Whenever this minion takes damage, deal 2 damage to your hero.
- Tar Creeper / 1 Attack, 6 Health.
- Elise, the Trailbrazer / [7 Mana]
- Gadgetzan Auctioneer / [5 Mana] Whenever you cast a spell, gain 1 Mana Crystal this turn only.
- Cult Master / [3 Mana] After a friendly minion dies, gain 1 Mana Crystal this turn only.
- Acolyte of Pain / Whenever this minion takes damage, draw a card and also deal that damage to your hero.
Harrison Jones / Battlecry: Destroy your opponent’s weapon and draw 2 cards if you do. - Yogg-Saron, Hope’s End / [9 Mana] Can’t be Bounced. Battlecry: Cast a random spell for each spell you’ve cast this game (targets chosen randomly).
- N’Zoth, the Corruptor / Can’t be Bounced. Battlecry: Summon your Deathrattle minions that died this game.
- C’Thun / Can’t be Bounced. Battlecry: Deal damage equal to this minion’s Attack randomly split among all enemies.
- Deathwing / Battlecry: Destroy a minion. Deal 3 to all minions. Deathrattle: Discard 3 random cards.
- Deathwing, Dragonlord / Deathrattle: Take control of all Dragons your opponent controls.
- The Boogeymonster / [6 Mana] Whenever this attacks and kills a minion, gain +2/+2. [ALL TYPES]
- Soggoth the Slitherer / 6 Attack, 11 Health.
- Corrupted Seer / [4 Mana]
Alright, I think I got everything. I did a quick ‘gloss-over’