My Stats/History (games played mostly in D5 - legend):
31-16 (66%) -- Last 10 days; most recent builds of the deck.
46-34 (57%) -- All time since Version 1 in late April 2021.
Best Class Matchup -- Hunter [9-2] 82% & Rogue [2-0] 100% (insufficient data atm)
Worst Class Matchup -- Druid [4-5] 44%
Razormane Battleguard -- The absolute star of the deck, and the reason I made it in the first place. This card is nuts, especially against classes that have a tough time answering it early (Druid, Paladin, Warrior, Rogue, Priest). Always keep on mulligan in every matchup.
Soul of the Forest -- Always keep in mind opponent's AoE cards. Try to play the turn before they can clear. Always consider if you will have more minions next turn than this turn before you play. Greed can be necessary in aggro.
Toad of the Wilds -- We have a small hand size generally and Nature spells aren't always guaranteed.
Plaguemaw the Rotting -- Seems like a natural fit but I could rarely get it to make a difference.
Voracious Reader -- A second copy can help the terrible draw power of the deck, however drawing both copies means you basically lose the game, as you can't go down 2 cards and drop 3 mana for a draw 2. I only run 1 copy to avoid this scenario.
K'thir Ritualist -- Not as much of a meme as I thought [only applies to aggro]. 4 drops are generally pretty powerful, but if the opponent plays a randomly generated 4 drop against you instead of their decks usual turn 4 play, they will often be moving too slow. I have tested this card a ton, and the opponent barely ever plays the card it generates, and even more rarely do I feel punished by it.
Gibberling -- One of the best 1 drops ever created, and I only recently took the second copy away. It suffers from the same problem Voracious Reader does, in that if you draw both, you will likely lose. Since the deck's creation, more and more cheap spells have been cut, and Gibberling has gone from a core member of the deck to your main answer to going second - pair with Coin