The addition of this slot makes these planeswalkers a lot more accessible, and at least partially explains the price discrepancy for these cards
most graveyard decks can plan to beat one Artifact or Enchantment that hoses them, but given those cards actually help our gameplan, we run too many to just remove
Also, for this set, when they refer to Booster Fun, they mean one of the following treatments: Artist Rare, Woodblock Rare, Borderless Character, Borderless Lands, and EA Legendary Cards
Of course the classic dilemma with cards that let your opponents choose their fate is that they can always choose the least bad option, and there will be games where you desperately need to kill that Etali, Primal Conqueror, but your opponent is perfectly comfortable taking eight damage
Surveil is a mechanic that lets you look at the top card of your library, and either keep it there or put it into the graveyard
Sword Coast Sailor and Raised by Giants are two options that broaden your access to other colors and make for some quick kills via commander damage.