Cheapest priced copy (New Phyrexia): $0.35 at Card Kingdom, near mint, their price list as of .
Corrosive Gale 
Sorcery · Uncommon · New Phyrexia · #107
({G/P} can be paid with either {G} or 2 life.)
Corrosive Gale deals X damage to each creature with flying.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| New Phyrexia | 107 | Uncommon | $0.35 | $0.49 |
5 rulings from Wizards of the Coast
- 1 June 2011A 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.
- 1 June 2011If you're at 1 life or less, you can't pay 2 life.
- 1 June 2011As 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.
- 1 June 2011Phyrexian mana is not a new color. Players can't produce Phyrexian mana.
- 1 June 2011To calculate the mana value of a card with Phyrexian mana symbols in its cost, count each Phyrexian mana symbol as 1.