You cause a crossbow bolt that you are holding or that is loose and within 5 foot of you, to fly towards a creature within range. Make a ranged spell attack against your target. On a hit, the target takes 1d8 plus your intelligence modifier piercing damage.

This spell does not make the bolt magical but does convey any additional bonus or properties the bolt has.  

The spell launches more than one bolt when you reach higher levels: two bolts at 5th level, three bolts at 11th level, and four bolts at 17th level. You can direct the bolts at the same target or at different ones. Make a separate attack roll for each bolt.