The spell creates a number of force bolts equal to 1 + your Intelligence modifier. You must target a different creature with each bolt; any extras can't be used.
You can now target a specific creature with more than one bolt. Once you hit that target, you must target a different creature, and so on. (Roll your attack after each bolt before picking a target for the next bolt.)
On a miss, a bolt now deals miss damage equal to your level.
Increase the number of bolts by 1.