Curse of Wizardry

Oracle Text

As Curse of Wizardry enters the battlefield, choose a color.

Whenever a player casts a spell of the chosen color, that player loses 1 life.

Card Rulings

6/15/2010 Curse of Wizardry affects all players, including you.
6/15/2010 If a player casts a spell of the chosen color, Curse of Wizardry’s second ability triggers and goes on the stack on top of it. The ability will resolve before the spell does.