Me, casual?!

*raises hand*

I made casual decks.
Now only about 70% of my decks are completely annoying/dick/broken in some way.

Your "X" deck = casual, but EVIL. Fireballs ftw!

Question:

would Mirari copy the values of X?

hmmm

No, it doesn't. Anytime a copy effect copies an X spell based off a mana cost that wasn't paid for, it becomes 0.

Clean.Leet wrote:

No, it doesn't. Anytime a copy effect copies an X spell based off a mana cost that wasn't paid for, it becomes 0.

Can you pay for X on the time of attachment?

Copying a spell copies the values of that spell, not the cost.
So, unless I'm missing something and you're talking about a fireball for 0, the value of X will be copied regardless of how it was payed (a shoal, for example).

503.2. When copying an object, the copy acquires the copiable values of the original object’s
characteristics (name, mana cost, color, card type, supertype, subtype, expansion symbol, rules text,
power, toughness, loyalty) and, for an object on the stack, choices made when playing it (mode,
targets, the value of X, whether a kicker cost was paid, how it will affect multiple targets, and so
on). The “copiable values” are the values that are printed on the object, as modified by other copy
effects, by “as . . . comes into play” and “as . . . is turned face up” abilities that set characteristics,
and by abilities that caused the object to be face down. Other effects (including type-changing and
text-changing effects), status, and counters are not copied.


Ok, X is copied. My mistake. It's because Fireball would be on the stack, and X is simply a characteristic of the card while it's on the stack.

*groan* when will you people learn Casual is the ultimate type its like T0 you can use EVERY CARD YOU OWN and even ones you made up yourself unhinged EVERYTHING and their are no banning/restrictions.