But you can use any type of mana to pay for generic costs
Rift is a perfect filler card being useful against all other archetypes and being both an early game play and a late game powerhouse
If sending just one or two cards, consider taping the card-holding top-loader(s) between two more empty top-loaders, for extra rigidity and peace of mind (ensure tape is applied at the sides, so there is no way for the card(s) to come in contact with the tape)
You can also use it against your foe's Zombifying their dork, just tuck it instead
They're obviously not competitive in a tournament sense, but this deck provides a strong collection of playable, perfectly serviceable cards to learn the game and begin to build a collection
Feldon of the Third Paths effect encapsulates that story perfectly while the flavor text gives a simple and direct look at his reasons