Kaervek, the Punisher

If you don’t want to cast the copy, you can choose not to; the copy ceases to exist the next time state-based actions are performed.

Because you’re paying the spell’s costs, if the spell has {X} in its mana cost, you may choose its value as normal.

The copy is created in and cast from exile, so effects such as that of Aven Interrupter’s last ability will apply.

For example, an ability that triggers when you cast a spell that targets an opponent will trigger at the same time as an ability that triggers whenever you commit a crime. Those abilities can be put on the stack in either order (if you control them both), and they’ll both resolve before the spell that caused them to trigger.

Changing the target or targets of a spell or ability won’t affect whether or not the controller of that spell or ability has committed a crime. Only the initial targets chosen for that spell or ability are used to determine whether or not its controller committed a crime.