"Introducing" delve, a futureshifted keyword, would have to be enough
Anything with the ability to improve consistency and set up players for a counter when going second is good, but if your opponent has built up quite the impenetrable field with nine or more cards on their field when excavating from the deck, your opponent must shuffle their entire field and Graveyard in the End Phase
Cybernetic Horizon Cards 5
Dimir decks can't beat enchantments normally and Blast Zone allows them that option while being able to manage swarms of creatures along the same CMC
Diabolic Intent I still see Diabolic Intent as a relatively underplayed and underrated tutor
In this set, you can find a heartwarming scene depicting Pikachu, Sylveon, and Chespin eating bread, sandwiches, and rice balls