The absence of recent fetch land reprints is something that a lot of the MTG community has been clamouring after for a long time
Like most Magic: The Gathering cards, the value of Emergent Ultimatum depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Ikoria: Lair of Behemoths)
But replacing Yawgmoth with these cards in the command zone instantly lowers the power and amps up the goofiness of your black sac deck, so they might be nice to have on hand in case you walk into the LGS and everyone is actually shuffling up precons
It gives everyone extra cards during their upkeep, although everyone must discard too
To be fair some of the early SWSH trainers have become hard to find for new players, hence the price on cards like Scoop Up Net
In total, 14 cards that previously had creature types like beasts or lizards became dinosaurs