There are plenty cards that pay for discarding cards, and plenty that exile discarded cards from the graveyard
Past Modern Horizons examples include Force of Negation, Wrenn and Six, Murktide Regent, or Grist, the Hungertide
Organize your cards by category, keep them upright in rows, and use cardboard dividers to separate sections
Apart from the end-of-turn tricks, Flickerwisp is the only one of our exile / return effects that can target our opponent's things, which means we can use it to get rid of +1/+1 counters or a blocker for a turn, or get in an attack by removing an Ensnaring Bridge
That includes Jack Kirby's drawing of Spidey on the cover of the character's very first comic book appearance for the card "Heroic Intervention," along with at least one clever pun