Corrosive Gale
Sorcery
( can be paid with either 
or 2 life.)
Corrosive Gale deals X damage to each creature with flying.
"Wipe Sheoldred's spies from the sky. She'll see the result of our vision soon enough." —Glissa
Dan Murayama Scott
New Phyrexia (NPH)
• #107Rulings
A card with Phyrexian mana symbols in its mana cost is each color that appears in that mana cost, regardless of how that cost may have been paid.
(wotc • 2011-06-01)
If you're at 1 life or less, you can't pay 2 life.
(wotc • 2011-06-01)
As you cast a spell or activate an activated ability with one or more Phyrexian mana symbols in its cost, you choose how to pay for each Phyrexian mana symbol at the same time you would choose modes or choose a value for X.
(wotc • 2011-06-01)
Phyrexian mana is not a new color. Players can't produce Phyrexian mana.
(wotc • 2011-06-01)
To calculate the mana value of a card with Phyrexian mana symbols in its cost, count each Phyrexian mana symbol as 1.
(wotc • 2011-06-01)
Rulings
A card with Phyrexian mana symbols in its mana cost is each color that appears in that mana cost, regardless of how that cost may have been paid.
(wotc • 2011-06-01)
If you're at 1 life or less, you can't pay 2 life.
(wotc • 2011-06-01)
As you cast a spell or activate an activated ability with one or more Phyrexian mana symbols in its cost, you choose how to pay for each Phyrexian mana symbol at the same time you would choose modes or choose a value for X.
(wotc • 2011-06-01)
Phyrexian mana is not a new color. Players can't produce Phyrexian mana.
(wotc • 2011-06-01)
To calculate the mana value of a card with Phyrexian mana symbols in its cost, count each Phyrexian mana symbol as 1.
(wotc • 2011-06-01)