As a touch of sweetness on top of it all, Ephara is very difficult to remove, having indestructible and being mostly intangible as a noncreature until you can bring your devotion high enough (which itself can be easily controlled with flash creatures)
Choosing left or right when it enters locks the table into attacking only one way, which reshapes how opponents interact
The three-drop uncommon Blue wall has a bigger butt at six toughness and then taps for no mana to surveil
Electro, Assaulting Battery Oh Look, A New Combo Piece Vivi Ornetier from Final Fantasy is an incredibly underpowered card that needed a lot more support, and its finally arrived in the form of Electro, Assaulting Battery
While it doesn't permanently remove a threat, its ability to disrupt crucial plays at zero cost has proven invaluable, especially in high-pressure formats like Modern and Legacy
Drix Interlacer is a huge digital-only payoff and enabler