Enchantment, 3{U/B}{U/B} (5)
Rare
Whenever a blue creature enters the battlefield under your control, you may have target player draw a card.
Whenever a black creature enters the battlefield under your control, you may have target player discard a card.
Illus. Franz Vohwinkel

5/1/2008: An object that's both of the listed colors will cause both abilities to trigger. You can put them on the stack in either order.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern