As design philosophy has changed and they have added more value to cards (including lands), card advantage has become less of a constraint, and being constrained as mana has become the games core constraint
The packaging mirrors the heavy metal art-style from the recent Secret Lair: Secretversary Superdrop (see "Wizards of the Coast Announces a 'Magic: The Gathering' 'Secretversary' Superdrop"), which may be an indicator of what this round of showcase cards will look like
Timing, decision-making process based on flipped cards, fighting through grave hate cards, etc
+1: Put a +1/+1 counter on up to one target creature
I have some bias because all four of them either focus on mechanics I find really fun (monarch, politics and voting, and Food) or play into archetypes I already really liked (Grixis reanimation and spellslinger)
But Im looking for spells that youd want to play across a wider variety of decks to help load up that other hand with value