Text (UL+errata): As an additional cost to cast ~this~, sacrifice an artifact. ; Search your library for an artifact card and put that card onto the battlefield. Then shuffle your library. [Oracle 2009/07/08]
Sacrificing an artifact is part of the play cost of this spell. [Barclay 1999/02/09]
You are not forced to play an artifact if you don't want to. You can look in your library and not choose any card. See Rule 701.14. [D'Angelo 2000/12/07]
You do not have to find an artifact card if you do not want to. See Rule 701.14. [D'Angelo 2001/07/14]
Vintage tournaments (see Rule 911) have restricted this card since 1999/10/01.
Legacy tournaments (see Rule 912) have banned this card since 1999/10/01.
Extended tournaments (see Rule 913) have banned this card since 2004/01/01.
