Good morning.
When playing March of Swirling Mist, the first prompt asks how many cards to exile from hand to pay the cost.
This is the second time it has happened where I play too quickly and forget that part and select the value for X instead.
The next prompt then asks for the value of X to which, realising my mistake, I cancel the cast.
After cancellation, the card cannot be selected again to be played. Neither on that turn or the following two at least.
[[March of Swirling Mist]]
Playing the current version.