These were generally cards that were seen to be too problematic when you always had access to them from the command zone (Rofellos, Llanowar Emissary is a great example, as it could consistently come out on turn 2, or even turn 1 with a particularly spicy hand!)
That, however, is just hope talking, as the set will be predominantly focused on merfolk and treasure hunting
The sneakier way is with effects that tax your opponents as they attack you, like Ghostly Prison
X/Y 20th Anniversary Festa Pikachu While the Japanese X/Y 20th Anniversary Festa Pikachu is pretty recent as far as rare Pokmon cards go, it has a classic feel that older fans will still adore
Practiced Offense I really hope not to play against whatever team is represented on Practiced Offense, because they're putting on a killer performance
Turbo fog wins by milling out their opponent, typically with a mill engine like Jace's Erasure or Sphinx's Tutelage that destroys an opposing library bit by bit as its owner watches you nullify each combat step