Text (10): {X},{Tap}: Search your library for a creature card with converted mana cost X or less, reveal it, and put it into your hand. Then shuffle your library.
X can be zero if you want. [DeLaney 1998/10/05]
You look in your library but you do not have to pick a creature even if you have one that meets the criteria. See Rule 701.14. [D'Angelo 2000/12/07]
If you do not pick a creature with cost X or less, shuffle and continue. [DeLaney 1998/10/05]
