Missile Multiplication I
(Alteration, Evocation)

Range:  0
Components:  V, S
Duration:  One fifth round
Casting Time:  6
Area of Effect:  Missile touched
Saving Throw:  None

A missile must be fired within the next twelve seconds. This spell makes 3d6 missiles out of one. Only normal missiles are affected.
The stuff disappears one round after shooting, but their effects stay. A nasty assassin in my game used the 5th-level version of this spell with sleep-poison darts to capture a PC.
You have to roll to hit for each missile, by the way. However, if your first missile hits, you have a +3 on all thereafter.

