Nightshade Assassin

Creature - Human Assassin 2/1, 2BB (4)
First strike
When Nightshade Assassin enters the battlefield, you may reveal X black cards in your hand. If you do, target creature gets -X/-X until end of turn.
Madness {1}{B} (If you discard this card, you may cast it for its madness cost instead of putting it into your graveyard.)¹
Illus. Alan Pollack

Gatherer Card Rulings [Nov 2009]

• 9/25/2006: You choose a target creature whether or not you choose to reveal any black cards in your hand.
• 9/25/2006: You may choose to reveal X black cards in your hand, then choose X to be 0.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Time Spiral (Uncommon)