Modern format has been graveyard-reliant by its start (remember Tarmogoyf being the threat of the format for 5+ years ) and even in 2022 many tier 1 decks (Murktide/Living end/etc) relies on GY
While you can tune engines to draw extra cards and control the game, some tactics are simply more consistent (bunnies can easily overwhelm an opponent, for example, thanks in part to the new Offspring mechanic)
Because colorless mana rocks that produce multiple mana are more popular than ones that produce mana of a specific color, they synergize well with very expensive colorless creatures or spells that can have a big impact on the game
When used to full effect, the Alpha Deathclaw can lock your opponent out of being able to play for any spells at all
The codes will not grant the exact same cards that come in the physical boosters, but six randomized ones from the collection to which they belong
Not just limited to the plane's five castles, there are as many stories on Eldraine as there are people