Text (VI+errata): 2/2, Flanking. ; When ~this~ enters the battlefield, you may pay {U}. If you don't, destroy target Knight and it can't be regenerated. [Oracle 2009/07/08]
Can destroy an opponent's knight. [Duelist Magazine #17, Page 30]
If no other knights are in play, pay the mana or destroy this card. [Visions FAQ 1997/02/16]