Split Decision

The copy will have the same targets as the spell it's copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. If, for one of the targets, you can't choose a new legal target, then it remains unchanged (even if the current target is illegal).

If the spell being copied has an X whose value was determined as it was cast (like Skeletal Scrying has), the copy will have the same value of X.

If duplication gets more votes, Split Decision creates a copy of the spell. You control the copy. That copy is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger. The copy will resolve like a normal spell, after players get a chance to cast spells and activate abilities.