*Bitch Please*
Escolhendo 0, vao tokens, cartas q custam 0 e inclusive terrenos artefacto.

"Hide Rulings
10/4/2004 You can choose zero. Token creatures and artifact lands have converted mana costs of zero, for example."

Querem a fonte disse? here ya go: http://gatherer.wizards.com/pages/card/details.aspx?name=Void