Curse of Echoes

If the original spell is modal (that is, it says “Choose one —” or the like), each copy will have the same mode(s). You can’t choose different ones.

You can’t choose to pay any additional costs for the copy. However, effects based on any additional costs that were paid for the original spell are copied as though those same costs were paid for the copy too. For example, if the enchanted player sacrifices a 3/3 creature to cast Fling, each copy of Fling will also deal 3 damage.

Each copy will have the same targets as the spell it’s copying unless its controller chooses new ones. That player may change any number of the targets, including all of them or none of them. If, for one of the targets, that player can’t choose a new legal target, then it remains unchanged (even if the current target is illegal).