Rulings

• 2011-06-01
  Phyrexian mana is not a new color. Players can’t add Phyrexian mana to their mana pools.
• 2011-06-01
  If you’re at 1 life or less, you can’t pay 2 life.
• 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.
• 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.
• 2011-06-01
  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.
• 2024-06-07
  A Phyrexian mana symbol contributes 1 toward the mana value of a card, even if life is paid for it. Specifically, Dismember's mana value is always 3.