Along with the fact that these decks are made for Commander, which means you can pick up a deck to tweak as much as you want from then on, theyre also a better place for reprints than Standard sets
Having lifegain as a theme encourages new players to develop potentially bad habits, overvaluing lifegain for longer than they would otherwise
Lolth and The Wandering Emperor also join the fray as sticky threats that just accrue value for you over time
This can be a helpful way of quickly drawing cards when you need to, but has especially exciting potential when combined with other amethyst Rise of the Floodborn cards that trigger effects as they leave play - letting you yoink them off the field using Yzma, Scary Beyond All Reason, activate their own powers and then draw two cards, all in a single play
Outside of mono-colored decks, and some decks in older formats that use Fetch Lands, Multiversal Passage can improve multicolored manabases across formats
If X is 10 or more, also create X 4/4 white Angel creature tokens with flying and vigilance