Promo 151/XY-P - Gyarados Poncho Pikachu 51
While Wort, the Raidmother and Djinn Illuminatus are nice copy spell reprints, the coolest is Charmbreaker Devils
Sometimes the only good bug is a red bug
There's a wide variety of instants, sorceries, and even cards that interact with a few specific mechanics that will help you get ahead in card advantage, the iconic concept Magic: The Gathering players constantly look for
Here is the rather short list of other Dimir cards that have had play in the cube, mostly they are mill cards or niche combo peices and are therefore about as narrow as it gets
Mostly due to early templating and designers not realizing what they were doing rules-wise, Urza's MineUrza's Mine, Urza's Power PlantUrza's Power Plant, and Urza's TowerUrza's Tower have the land types "Urza's Mine", "Urza's Power-Plant", and "Urza's Tower"