Perplex

Instant, 1UB (3)
Counter target spell unless its controller discards his or her hand.

Transmute {1}{U}{B} ({1}{U}{B}, Discard this card: Search your library for a card with the same converted mana cost as this card, reveal it, and put it into your hand. Then shuffle your library. Transmute only as a sorcery.)¹
Illus. Tsutomu Kawade

Gatherer Card Rulings [Nov 2009]

• 10/1/2005: If the spell's controller has no cards in his or her hand, that player can still choose to discard his or her hand and prevent the spell from being countered.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (1/9)	Ravnica: City of Guilds (Common)