The shorter fibers of recycled papers often translates to a weaker base sheet
If you give your opponent a Puppet or Infector you can bounce it back to retrigger its effect if you so desire
Back in the day, players could go up against various NPC as they explore the world, collect cards, and progress through a story
The best option is the in-theme upgrade to Cipher Dragon, Neo Galaxy-Eyes Cipher Dragon which can steal up to 3 of your opponents monsters at a time, without even targeting
Mirrodin and Darksteel are predominantly artifacts, while Strixhaven more than doubles the usual amount of instants and sorceries
For Hearthhull, I think it comes down to the fact that this deck is dumping tons of lands into the graveyard and it most likely wins the game by bringing them all back in one go - using a card like Splendid Reclamation - for a mass of triggers