The other four bans for Standard are more interesting, if only because you might not have seen them quite as often when playing ranked on Arena
Mostly the upgrade from +1 to +2 on the discard and the free(ish) zombie token make a flipped Heretical Healer rather more oppressive to handle than the more reliable Liliana of the Veil
Playing a turn-2 Rofellos into turn-3 Primeval Titan is the height of unfair Magic and just the beginning of what this elf druid enables
There are several factors that impact whether a card is among the rarest MTG cards of all time, from the size of the print run to the grading of the card, autographs to misprints, but the biggest one is the Reserved List
Most are at mythic rarity, but there are a couple regular rares whose value justifies the price of a Play Booster
Rarely and only if specified by the card making the change, as in New Blood