The missile strikes unerringly, even if the
target is in melee combat or has less than total
cover or total
concealment. Specific parts of a creature can't be singled out. Inanimate objects are not damaged by the spell.
For every two
caster levels beyond 1st, you gain an additional missile-two at 3rd
level, three at 5th, four at 7th, and the maximum of five missiles at 9th
level or higher. If you shoot multiple missiles, you can have them strike a single creature or several creatures. A single missile can strike only one creature. You must designate
targets before you check for
spell resistance or roll
damage.