Historical Rules · 13 July 2013
Rule 709.1c
Official source text from the 13 July 2013 Rules release
A flip card's color and mana cost don't change if the permanent is flipped. Also, any changes to it by external effects will still apply.
Historical Rules · 13 July 2013
Official source text from the 13 July 2013 Rules release
A flip card's color and mana cost don't change if the permanent is flipped. Also, any changes to it by external effects will still apply.