You can broker deals by swapping opponents' Creatures with each other, make a few "friends," or just make sure you're walking away with the best thing on the table
Both of these cards serve as ways to get a first dredge card in the graveyard, and with the way I mulligan, I might be paying too much attention to this, but it does still come up
Belle has plenty of Shift-worthy options and ties into several common types (Hero, Princess, and Sorcerer)
You can also target another player, whether or not they have that card in their library.
Wan Shi Tong, All-Knowing Wan Shi Tong, All-Knowing provides the extremely rare reward for putting permanents into a players libraryan effect so niche it's rather underwhelming
They are ideal if you want to create a deck, play a Limited batch with friends or just feel fun exploring surprises