Then you have the 5-6 power level, usually an upgraded version of a precon or a deck with a plan
Cramped Vents // Access Maze is a hefty chonker of a card Mana Value wise so maybe not one to play if youre playing Dark Confidant, as Rooms when not in play or on the stack are equal to total mana value
Amazing Spider-Man Captain America, Living Legend Echo, Perceptive Prodigy Elektra, Daughter of the Hand Gran-Gran Hellcat, Undying Vigilante Iroh, Grand Lotus J
If poison-proliferate control takes off, this is a great way to remove creatures while furthering your ultimate win-con simultaneously, and that can make this a somewhat reasonable option but probably only for that kind of deck
Any abilities that trigger based on those creatures being dealt damage will trigger