Historical Rules · 1 February 2013
Rule 117.7d
Official source text from the 1 February 2013 Rules release
If a cost is reduced by an amount of mana represented by a Phyrexian mana symbol, the cost is reduced by one mana of that symbol's color.
Historical Rules · 1 February 2013
Official source text from the 1 February 2013 Rules release
If a cost is reduced by an amount of mana represented by a Phyrexian mana symbol, the cost is reduced by one mana of that symbol's color.