Riddles in the Dark is a rare Instant card from Magic: The Gathering (The Hobbit, HOB).
Rare
The Hobbit (HOB)
{2}{U}
Mana Value
3
Colors
U
Card Text
Look at the top four cards of your library and separate them into a face-down pile and a face-up pile. An opponent chooses one of the piles. Put that pile into your hand and the other into your graveyard.