The non-negotiables for your starting hand are at least one basic land, one fetch land, and one low-cost creature, with the rest of your hand being more fluid, again, based on how aggressive you like to play
Fated Clash Final Showdown Flawless Maneuver Frontline Medic Gavony Gideon's Phalanx Gideon, Ally of Zendikar Gideon, Martial Paragon Gimli, Mournful Avenger Grand Crescendo Gyome, Master Chef Hajar, Loyal Bodyguard Hakoda, Selfless Commander Heliod, God of the Sun Hero of Goma Fada Hour of Devastation Impervious Greatwurm Inspiring Call Iroas, God of Victory Join Shields Kamahl's Will Kamahl, Heart of Krosa Karfell Kennel-Master Keeper of the Crown (adventurer)(playtest) King Darien XLVIII Knight Exemplar Knight of Lost Causes (playtest) Krang, Utrom Warlord Kytheon, Hero of Akros Last Night Together Lena, Selfless Champion
The sideboard cards to hose the graveyard decks and their answers, often the sideboard cards from the graveyard decks, have by far the highest impact on the game of any cards in either 75
1x Double-Faced Uncommon/Rare/Mythic 1x Single-Faced Uncommon/Rare/Mythic (1 R/M in every pack
And yes, Cauldron Familiar stacks well with multiple copies of Witch's Oven