Text (SM+errata): 4/4. ; As ~this~ enters the battlefield, choose a color. ; When you control no permanents of the chosen color, sacrifice ~this~. [Oracle 2009/07/08]
If you somehow get one of these without choosing a color, the second ability won't ever trigger. For example, a Cemetery Puca turns into one of these. [Shadowmoor FAQ 2008/04/21]
