Naru Meha, Master Wizard

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).

Naru's triggered ability can copy any instant or sorcery spell, not just one with targets.

The copy is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger.

The controller of a copy can't choose to pay any alternative or additional costs for the copy. However, effects based on any alternative or additional costs that were paid for the original spell are copied as though those same costs were paid for the copy.

If the spell that's copied is modal (that is, it says "Choose one —" or the like), the copy will have the same mode. A different mode can't be chosen.

Because damage remains marked on a creature until it's removed as the turn ends, nonlethal damage dealt to a Wizard you control may become lethal if Naru leaves the battlefield during that turn.