Instant, 1U (2) You may put a creature card from your hand into play. If you do, sacrifice it unless you pay its mana cost reduced by up to {2}.1
Illus. David Ho
The mana cost you pay includes colored mana. It effectively means that you cast the other spell as normal but pay 2 less generic mana in doing so. [D'Angelo 1999/05/01]
Any X in the creature's mana cost is zero. [Aahz 1996/11/15]
If a Clone is played, you pay the Clone's mana cost (reduced by up to {2}), and not the new form's cost. [DeLaney 2000/03/31]
The creature does enter play first before you make the choice on whether or not to sacrifice it. Any abilities that trigger on it entering play, however, do not get put on the stack until after you sacrifice it or pay the cost. [D'Angelo 2007/05/15]
Legacy tournaments (see Rule 802) have banned this card since 2007/06/20.
Vintage tournaments (see Rule 801) have restricted this card since 2008/06/20.
Classic Sixth Edition
(Rare)