30th Anniversary Edition

Illusionary Mask

{X}: You may choose a creature card in your hand whose mana cost could be paid by some amount of, or all of, the mana you spent on {X}. If you do, you may cast that card face down as a 2/2 creature spell without paying its mana cost. If the creature that spell becomes as it resolves has not been turned face up and would assign or deal damage, be dealt damage, or become tapped, instead it's turned face up and assigns or deals damage, is dealt damage, or becomes tapped. Activate only as a sorcery.

Magic Online Theme Decks

Masters Edition III

{X}: You may put a creature card with converted mana cost X or less from your hand onto the battlefield face down as a 0/1 creature. Put X mask counters on that creature. Activate this ability only any time you could cast a sorcery. The creature's controller may turn the creature face up any time he or she could cast an instant by removing all mask counters from it. This effect ends if the creature is turned face up.

Collectors' Edition

Intl. Collectors' Edition

Unlimited Edition

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X You can summon a creature face down so opponent doesn't know what it is. The X cost can be any amount of mana, even 0; it serves to hide the true casting cost of the creature, which you still have to spend. As soon as a face-down creature receives damage, deals damage, or is tapped, you must turn it face up.