Text (TE+errata): {3},{Tap}: Name a card. Reveal a card at random from your hand. If it's the named card, ~this~ deals 2 damage to target creature or player. [Oracle 2009/07/08]
You choose a target creature or player on announcement. [D'Angelo 2006/10/08]
If you have no cards in hand, you still have to name a card, but you cannot pick one randomly. So the Cursed Scroll does not deal any damage. [D'Angelo 2006/10/08]
Tempest/Stronghold/Exodus block format tournaments (see Rule 916.5) have banned this card since 1998/07/01.