Magic: The Gathering Comprehensive Rules Changes - Shadowmoor to Eventide

Magic: The Gathering Comprehensive Rules Changes

Shadowmoor to Eventide (Single Change View)

General changes

Old rule (Shadowmoor)	New rule (Eventide)
X [Click to view all changes.]
X If a spell or activated ability has a cost with an "{X}" in it, the value of X must be announced as part of playing the spell or ability. (See rule 409, "Playing Spells and Activated Abilities.") While the spell or ability is on the stack, the {X} in its mana cost equals the amount announced as part of playing the spell or ability. If a card in any other zone has {X} in its mana cost, the amount is treated as 0. If you're playing a spell that has {X} in its mana cost and an effect lets you play it without paying any cost that includes X, the only legal choice for X is 0. This does not apply to effects that only reduce a cost, even if they reduce it to zero. See rule 409, "Playing Spells and Activated Abilities." If a cost associated with a special action, such as a suspend cost or a morph cost, has an "{X}" in it, the value of X is chosen by the player taking the special action as he or she pays that cost. In other cases, X is defined by the text of a spell or ability. Note that the value of X may change while that spell or ability is on the stack. If X isn't defined, the controller of the spell or ability chooses the value of X. All Xs on an object have the same value.	X Many cards use the letter X as a placeholder for a number that needs to be determined. All instances of X on an object have the same value. If a spell or activated ability has a cost with an "{X}" in it, and the value of X isn't defined by the text of that spell or ability, the controller of that spell or ability chooses and announces the value of X as part of playing the spell or ability. (See rule 409, "Playing Spells and Activated Abilities.") While the spell or ability is on the stack, the {X} in its mana cost equals the announced value. If you're playing a spell that has {X} in its mana cost, the value of X isn't defined by the text of that spell, and an effect lets you play that spell without paying any cost that includes X, then the only legal choice for X is 0. This doesn't apply to effects that only reduce a cost, even if they reduce it to zero. See rule 409, "Playing Spells and Activated Abilities." If a spell or activated ability has a cost with an "{X}" in it, and the value of X is defined by the text of that spell or ability, then that's the value of X while that spell or ability is on the stack. The controller of that spell or ability doesn't get to choose the value. If a cost associated with a special action, such as a suspend cost or a morph cost, has an "{X}" in it, the value of X is chosen by the player taking the special action as he or she pays that cost. If a card in any zone other than the stack has {X} in its mana cost, the value of {X} is treated as 0, even if the value of X is defined somewhere within its text. In other cases, X appears in the text of a spell or ability but not in a mana cost or activation cost. If the value of X is defined by the text of that spell or ability, then that's the value of X while that spell or ability is on the stack. The controller of that spell or ability doesn't get to choose the value. Note that the value of X may change while that spell or ability is on the stack. If the value of X isn't defined, the controller of the spell or ability chooses the value of X.

Old rule (Shadowmoor)

New rule (Eventide)

If a spell or activated ability has a cost with an "{X}" in it, the value of X must be announced as part of playing the spell or ability. (See rule 409, "Playing Spells and Activated Abilities.") While the spell or ability is on the stack, the {X} in its mana cost equals the amount announced as part of playing the spell or ability. If a card in any other zone has {X} in its mana cost, the amount is treated as 0. If you're playing a spell that has {X} in its mana cost and an effect lets you play it without paying any cost that includes X, the only legal choice for X is 0. This does not apply to effects that only reduce a cost, even if they reduce it to zero. See rule 409, "Playing Spells and Activated Abilities." If a cost associated with a special action, such as a suspend cost or a morph cost, has an "{X}" in it, the value of X is chosen by the player taking the special action as he or she pays that cost. In other cases, X is defined by the text of a spell or ability. Note that the value of X may change while that spell or ability is on the stack. If X isn't defined, the controller of the spell or ability chooses the value of X. All Xs on an object have the same value.

Many cards use the letter X as a placeholder for a number that needs to be determined. All instances of X on an object have the same value. If a spell or activated ability has a cost with an "{X}" in it, and the value of X isn't defined by the text of that spell or ability, the controller of that spell or ability chooses and announces the value of X as part of playing the spell or ability. (See rule 409, "Playing Spells and Activated Abilities.") While the spell or ability is on the stack, the {X} in its mana cost equals the announced value. If you're playing a spell that has {X} in its mana cost, the value of X isn't defined by the text of that spell, and an effect lets you play that spell without paying any cost that includes X, then the only legal choice for X is 0. This doesn't apply to effects that only reduce a cost, even if they reduce it to zero. See rule 409, "Playing Spells and Activated Abilities." If a spell or activated ability has a cost with an "{X}" in it, and the value of X is defined by the text of that spell or ability, then that's the value of X while that spell or ability is on the stack. The controller of that spell or ability doesn't get to choose the value. If a cost associated with a special action, such as a suspend cost or a morph cost, has an "{X}" in it, the value of X is chosen by the player taking the special action as he or she pays that cost. If a card in any zone other than the stack has {X} in its mana cost, the value of {X} is treated as 0, even if the value of X is defined somewhere within its text. In other cases, X appears in the text of a spell or ability but not in a mana cost or activation cost. If the value of X is defined by the text of that spell or ability, then that's the value of X while that spell or ability is on the stack. The controller of that spell or ability doesn't get to choose the value. Note that the value of X may change while that spell or ability is on the stack. If the value of X isn't defined, the controller of the spell or ability chooses the value of X.