A disk or star of rock fires toward a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d8 bludgeoning damage.This attack ignores the added ac from half and 3/4 cover

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