backup mtg cards MTGNexus shuffle all but one of your hands into your library. Call for Backup | Mastery

However, given that they don't seem like a mechanic exclusive to March of the Machine, but rather a type we'll see in Magic: The Gathering from now on, it's only a matter of time before cards come out that are good enough to be present in high-power level Metagames

The trading card platform does this very well, Miller continues

Ink-Eyes, Servant of Oni Ink-Eyes, Servant of Oni is best known for recruiting creatures from your opponents graveyard to your side of the battlefield whenever it deals combat damage to a player

Modern Hammer Time decks have evolved beyond the use of Cacophony Scamp, but it's a nice way to demonstrate this card's potential