booster box collector Lorwyn Eclipsed - Display Traditional Foil of any rarity replaces a Common in 33% of boosters Magic The Gathering - Avatar

each player sends the top 4 cards from their Deck to the GY, then if any monsters were sent to either GY by this effect, you can Special Summon 1 of those monsters to your field

Or at least a Space Typhoon card

it can be a way to get a second Counterspell to hold off an incoming threat or even be an aggressive way to get an additional 3 damage from a Lightning Bolt

If you want to maximize Library, lean hard on early interaction, free spells, and powerful acceleration, which is basically what you want anyways (and therefore is something everyone is competing for)

Even today its surprisingly fun as a political tool in pitched games