Gaze of Granite

Oracle Text

Destroy each nonland permanent with converted mana cost X or less.

Card Rulings

4/15/2013 If a permanent has in its mana cost, the value of that X is 0.
4/15/2013 The converted mana cost of a creature token is 0 unless that token is a copy of another creature, in which case it copies that creature’s mana cost.