With the singleton decks required by the Commander format, they'll eventually have to get rid of certain cards central to their strategies, leaving them unable to play how they want
In fact, Ill break it down into steps for you: Each player exiles their hand
The problem is that, in most decks, Harnessed Lightning kills four-toughness creatures at instant speed, and in black decks, Grasp of Darkness and even Fatal Push offer the same power, so it will take a pretty specific build (a deck that doesn't care about energy, doesn't want a Lightning Axe package, and isn't playing black) for a deck to really want Cut // Ribbons over the other available options
Full Throttle Mana Value: 4RR Rarity: Rare Type: Sorcery Card Text: After this main phase, there are two additional combat phases
here's how they work
The back face, along with the flavor text, explains how the denizens of Vryn defeat the Phyrexians, by overloading the mage-rings