Historical Rules · 8 April 2016
Rule 202.3a
Official source text from the 8 April 2016 Rules release
The converted mana cost of an object with no mana cost is 0, unless that object is the back face of a double-faced permanent.
Historical Rules · 8 April 2016
Official source text from the 8 April 2016 Rules release
The converted mana cost of an object with no mana cost is 0, unless that object is the back face of a double-faced permanent.