This spell creates a magical, glowing swarm of gnats that appear around the target. The gnats fill a 5-foot emanation around the target, and seek to kill vermin. There are 2 gnats for every caster level you possess.
Mindless, non-magical vermin (mosquitoes, fleas, etc.) will not enter the emanation. A vermin who willingly enters the emanation is attacked by as many gnats as it has hit dice, each gnat dealing 1d4 damage. If a vermin exits and re-enters the emanation, a new set of gnats will attack it. If the vermin are in a swarm themselves (having the swarm subtype), every gnat converges on it, dealing 1d6 damage apiece. However, if you force the barrier against a vermin, the gnats will not attack it as long as it remains inside.
If the target of the spell is a vermin, it is unaffected by the swarm.
The spell ends when the duration expires, you dismiss it, or after all the gnats have attacked.
The generic name of this spell is Vermin Repellant.
Material component: A gnat (or head of a gnat), impaled on a small shaft of wood.