Plargg and Nassari [March of the Machine: The Aftermath] Betrayers of Kamigawa Promos Those with knowledge are wise

Those with knowledge are wise to listen to those with imagination

Set: Ravnica Allegiance Promos Type: Instant Rarity: Uncommon Cost: {1}{W}{B} Destroy target creature or enchantment

for example

Set: Eldritch Moon Prerelease Promos Type: Creature — Human Knight Rarity: Rare Cost: {2}{G}{W} Flash

Plargg and Nassari [March of the Machine: The Aftermath] Betrayers of Kamigawa Promos Those with knowledge are wiseSet: March of the Machine: The Aftermath Type: Legendary Creature Orc Efreet Rarity: Rare Cost: {3}{R}{R} At the beginning of your upkeep, each player exiles cards from the top of their library until they exile a nonland card. An opponent chooses a nonland card exiled this way. You may cast up to two spells from among the other cards exiled this way without paying their mana costs.