In turns, players will initiate rounds of MTG as usual, attacking the boss based on which creatures they have out, and which effects may apply
A Turn 1 Dryad Arbor isn't really any different from a Turn 1 Llanowar Elves or Elvish Mystic, and while this is true on Turn 1, the big difference is that Green Sun's Zenith is both a Llanowar Elves on Turn 1 and a Primeval Titan on Turn 5 or 6 (depending on how much you ramp)
Acererak the Archlich is the only payoff card that requires you to have completed a specific dungeon (Tomb of Annihilation)
Court of Ambition Court of Ambition is mediocre without the crown, but its quite punishing with it
Nissas Pilgrimage Nissa's Pilgrimage is good value at 3 mana, especially if spell mastery is already in effect when you play it
however, it just adds consistency for green decks and allows for a skimming of lands for additional creature threats