Pendulum: During the End Phase, add 1 Pendulum Monster from your Deck to your hand
Pairing your cards with a high-quality binder not only preserves their value but also makes it easy to transport and display them during game nights, tournaments, and trades
Dimir Midrange is also quite a grindy deck by nature, which means it will naturally accrue removal spells and interaction in the graveyard over time
There are multiple creatures that make tokens when they get counters, making this a combo machine
Alternative art & Illustration Rares: Many fan favourites (starters, Pikachu, Dragonair, etc.) get full-art story cards that feel more like mini prints than TCG pieces
Theres also cards that play with the cascade mechanic, in one way or the other