Being able to deal with Tarmogoyf for one mana (the previous best answer was Liliana of the Veils second ability or a Ulcerate) was a revolution for the modern format
Being able to cast one of these in response to a boardwipe always feels great
He talks counterfeits, repacks, and the lucrative commodity market
The cut is almost surely some of the previously mentioned Sam Black resource conversion stuff, and the empty sideboard slots are likely best as Collective Brutality
Its nice that the adventure side represents common themes found in those colors, so sac decks will like the black one, while spellslinger decks will play the red one, and so on
Wheels : Named after the iconic Wheel of Fortune, this discards your hand and then draws seven