Cordon of arrows

Contingency was an transmutation spell that made a number of missiles lie in wait for an triggering target.

Effect
The caster would have placed 4 non-magical bolts or arrows in the ground, these would wait until a target moved in range of 30 feet before striking the target. When casting the spell the caster could designate what type of creatures the spell would not attack and the spell would last for 8 hours. Missiles used would be destroyed after being fired at a target and the spell would end when to missiles remain.

If used with a higher level, more missiles could be used.

Components
This spell needed verbal and somatic components and four or more bolts or arrows.