Illusionary Mask [Collectors' Edition] 138 where X is that card's

where X is that card's mana value

you lose 1 life and that opponent gains 1 life

Set: EX: Delta Species Type: Lightning Rarity: Ultra Rare Retreat cost: 0

Set: Ninth Edition Type: Artifact Rarity: Rare Cost: {5} Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it

You gain life equal to its toughness

Illusionary Mask [Collectors' Edition] 138 where X is that card'sSet: Collectors' Edition Type: Artifact Rarity: Rare Cost: {2} {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