Riddle of Lightning

Instant, 3RR (5)
Choose target creature or player. Scry 3, then reveal the top card of your library. Riddle of Lightning deals damage equal to that card's converted mana cost to that creature or player. (To scry 3, look at the top three cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)¹
Illus. Daren Bader

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Future Sight (Common)