Sometimes the person who saves it doesnt necessarily know what they have, it can just be a cool looking curiosity that was going to be thrown away
Maximum interaction (which means cards that are hard to interact with are more likely to be cut, so no planeswalkers, limited shroud, only temporary spells/abilities give unblockable effect)
That creature then gets a boost to its power and toughness, as well as gaining additional abilities
Earlier core sets, even after they ceased being reprint-only products, tended to be very vanilla
You may not be able to literally select which cards are going to the graveyard with each discard spell, but by paying attention to what cards your opponent keeps and what they give up, you can try and time your punches to cut off their decisions and paralyze even the most powerful Constructed decks
Legendary Sorceries The first cards that came to mind when I considered reevaluating older cards were the legendary sorceries from Dominaria