Text (WL+errata): 4/4. ; At the beginning of your upkeep, sacrifice ~this~ unless you exile the top creature card of your graveyard. [Oracle 2009/07/08]
When the triggered ability resolves, you have the choice of removing the top creature card in your graveyard from the game. If you do not do so, then you sacrifice this card. You can choose to not remove the top creature card even if this card is not in play at the time. [D'Angelo 1999/07/10]
