X

X can mean two 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.

From the ()

Examples

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