X

X can mean several different things depending on its appearance on a card.

As a casting cost on a card, File:Manax.gif is a variable mana cost of a spell. In a card's text it means a variable, such as "Gain X life" or "Deal X damage" which is usually based on the File:Manax.gif in the mana cost of the spell. On a creature's power/toughness, X is defined in the card's text (for example X is the amount of creature's in your graveyard).

From the ()

Examples

• Blaze - File:Manax.gifFile:Manar.gif
  Sorcery
  Blaze deals X damage to target creature or player.