Divvy
Divvy cards are so called because they let one player separate a number of cards into two piles and the other player chooses what to do with them. For example, Death or Glory is a sorcery that lets you divide all creature cards in your graveyard into two piles. Your opponent then decides which pile is removed from the game and which pile returns to play. Fact or Fiction is the most popular of the divvy cards as you reveal the top five cards of your library, your opponent seperates them into two face-up piles and you decide which pile goes into your hand while the other pile goes into your graveyard.
Although the term "divvy cards" hadn't been coined yet, Phyrexian Portal from Alliances was the first. Six "divvy cards" were printed in Invasion, one in Time Spiral and another one in Shards of Alara.